Anatomy Quiz on Head and Neck Structures PDF

Q1. Which of the following structures is NOT found in the neck? A. Thyroid gland B. Hyoid bone C. Sphenoid bone D. Carotid sheath Correct Answer: C Distractors: The sphenoid bone is located in the skull, not the neck. 2\. Normas of the Skull Q2. The foramen ovale, seen in the base of the sku...

Q1. Which of the following structures is NOT found in the neck? A. Thyroid gland B. Hyoid bone C. Sphenoid bone D. Carotid sheath Correct Answer: C Distractors: The sphenoid bone is located in the skull, not the neck. 2\. Normas of the Skull Q2. The foramen ovale, seen in the base of the skull, transmits: A. Internal carotid artery B. Mandibular nerve C. Hypoglossal nerve D. Facial nerve Correct Answer: B Distractors: All options are foramina-related but only the mandibular nerve passes through the foramen ovale. Clinical Case: A patient presents with difficulty in mastication and altered sensation in the lower jaw. Which foramen is most likely involved? A. Foramen rotundum B. Foramen ovale C. Jugular foramen D. Foramen spinosum Correct Answer: B 3\. Mandible and Hyoid Q3. Which of the following is an age-related change in the mandible? A. Loss of mental foramen B. Decrease in alveolar height C. Fusion of the mandibular symphysis D. Increase in condylar thickness Correct Answer: B Distractors: Fusion and condylar changes are developmental, not age-related. 4\. Scalp Q4. The danger area of the scalp is: A. Skin layer B. Subcutaneous connective tissue C. Aponeurotic layer D. Loose areolar tissue Correct Answer: D Distractors: Clinical scenarios are linked only to loose areolar tissue due to emissary veins. 5\. Face Q5. The nerve responsible for the motor supply of facial muscles is: A. Trigeminal nerve B. Glossopharyngeal nerve C. Facial nerve D. Vagus nerve Correct Answer: C Clinical Case: A patient exhibits drooping of one side of the face and inability to close the eye on the affected side. Which nerve is likely injured? A. Hypoglossal nerve B. Facial nerve C. Trigeminal nerve D. Accessory nerve Correct Answer: B 6\. Pharyngeal Apparatus (Embryology) Q6. The first pharyngeal pouch gives rise to: A. Thymus B. Palatine tonsils C. Auditory tube D. Parathyroid glands Correct Answer: C Distractors: All options are derivatives but only the auditory tube is from the first pouch. 7\. Orbit Q7. Which structure does NOT pass through the superior orbital fissure? A. Trochlear nerve B. Optic nerve C. Oculomotor nerve D. Abducent nerve Correct Answer: B Clinical Case: A blow to the orbit leads to loss of upward gaze. Which muscle is most likely affected? A. Inferior rectus B. Superior rectus C. Lateral rectus D. Medial rectus Correct Answer: B 8\. Eye Ball and Extra-Ocular Muscles Q8. The action of the superior oblique muscle is: A. Adduction and elevation B. Abduction and depression C. Adduction and depression D. Abduction and elevation Correct Answer: B 9\. Ear Q9. The nerve supply of the external auditory canal is provided by: A. Vagus nerve B. Facial nerve C. Glossopharyngeal nerve D. Trigeminal nerve Correct Answer: D Clinical Case: A patient reports ear pain and dry mouth. Which nerve might be involved? A. Facial nerve B. Vagus nerve C. Glossopharyngeal nerve D. Trigeminal nerve Correct Answer: C 10\. TMJ and Muscles of Mastication Q10. The lateral pterygoid muscle is responsible for: A. Elevation of the mandible B. Retraction of the mandible C. Protrusion of the mandible D. Depression of the mandible Correct Answer: C Clinical Case: A patient presents with limited jaw opening and pain near the temporomandibular joint. Which muscle is likely involved? A. Masseter B. Temporalis C. Lateral pterygoid D. Medial pterygoid Correct Answer: C 11\. Nose and Paranasal Sinuses Q11. The most common site for epistaxis (nosebleed) is: A. Sphenoethmoidal recess B. Little's area C. Inferior meatus D. Nasolacrimal duct Correct Answer: B 12\. Tongue Q12. The muscle responsible for protruding the tongue is: A. Styloglossus B. Genioglossus C. Palatoglossus D. Hyoglossus Correct Answer: B Clinical Case: A patient presents with tongue deviation to the right side. Which nerve is likely affected? A. Left hypoglossal nerve B. Right hypoglossal nerve C. Left vagus nerve D. Right glossopharyngeal nerve Correct Answer: B 13\. Triangles of the Neck Q13. The carotid triangle is bounded by: A. Sternocleidomastoid, posterior belly of digastric, superior belly of omohyoid B. Sternocleidomastoid, anterior belly of digastric, superior belly of omohyoid C. Sternocleidomastoid, inferior belly of omohyoid, clavicle D. Sternocleidomastoid, posterior belly of digastric, inferior belly of omohyoid Correct Answer: A 14\. Pharyngeal Apparatus (Embryology) Q14. The second pharyngeal arch contributes to the development of: A. Maxilla B. Styloid process C. Hyoid bone (greater horn) D. Thyroid cartilage Correct Answer: B Clinical Case: A newborn is diagnosed with Treacher Collins syndrome. The anomaly is most likely associated with maldevelopment of which pharyngeal arch? A. First B. Second C. Third D. Fourth Correct Answer: A 15\. Orbit Q15. Which structure is NOT a content of the orbit? A. Optic nerve B. Ciliary ganglion C. Submandibular gland D. Superior ophthalmic vein Correct Answer: C Clinical Case: A patient presents with proptosis and inability to move the eye upward. Imaging reveals a tumor in the orbital cavity. Which muscle is most likely being compressed? A. Inferior oblique B. Superior rectus C. Medial rectus D. Lateral rectus Correct Answer: B 16\. Eyeball and Extra-Ocular Muscles Q16. The nerve supplying the superior oblique muscle is: A. Oculomotor nerve B. Trochlear nerve C. Abducent nerve D. Optic nerve Correct Answer: B Clinical Case: A patient presents with diplopia when looking downward. Which cranial nerve lesion is most likely causing this symptom? A. Oculomotor nerve B. Trochlear nerve C. Abducent nerve D. Optic nerve Correct Answer: B 17\. Ear Q17. The boundary between the external and middle ear is: A. Tympanic membrane B. Oval window C. Round window D. External acoustic meatus Correct Answer: A Clinical Case: A child presents with hearing loss and fluid in the middle ear. Which structure is most likely obstructed? A. External acoustic meatus B. Pharyngotympanic tube C. Round window D. Cochlear duct Correct Answer: B 18\. Pterygopalatine Fossa Q18. The maxillary nerve exits the pterygopalatine fossa via the: A. Foramen rotundum B. Infraorbital foramen C. Sphenopalatine foramen D. Pterygoid canal Correct Answer: B Clinical Case: A tumor in the pterygopalatine fossa is compressing the maxillary nerve. Which symptom is most likely? A. Loss of taste on the posterior third of the tongue B. Loss of sensation in the lower lip C. Numbness in the upper jaw and teeth D. Inability to abduct the eye Correct Answer: C 19\. TMJ and Muscles of Mastication Q19. Which of the following is a feature of the TMJ? A. Saddle joint B. Ball-and-socket joint C. Hinge and gliding joint D. Pivot joint Correct Answer: C Clinical Case: A patient reports clicking sounds during jaw movement and limited jaw opening. What is the most likely cause? A. Dislocation of the TMJ B. Injury to the facial nerve C. Inflammation of the temporalis muscle D. TMJ disc displacement Correct Answer: D 20\. Nose and Paranasal Sinuses Q20. The maxillary sinus opens into: A. Superior meatus B. Middle meatus C. Inferior meatus D. Sphenoethmoidal recess Correct Answer: B Clinical Case: A patient presents with severe pain over the cheeks and a blocked nose. Imaging reveals fluid accumulation in the maxillary sinus. This is most likely due to obstruction of: A. Nasolacrimal duct B. Maxillary sinus ostium C. Frontal sinus ostium D. Sphenoethmoidal recess Correct Answer: B 21\. Tongue Q21. The anterior two-thirds of the tongue receive general sensation from: A. Glossopharyngeal nerve B. Facial nerve C. Lingual nerve D. Hypoglossal nerve Correct Answer: C Clinical Case: A patient has difficulty swallowing and loss of taste in the posterior third of the tongue. Which cranial nerve is likely damaged? A. Glossopharyngeal nerve B. Vagus nerve C. Hypoglossal nerve D. Trigeminal nerve Correct Answer: A 22\. Triangles of the Neck Q22. The thyroid gland is located within the: A. Carotid triangle B. Muscular triangle C. Submandibular triangle D. Occipital triangle Correct Answer: B Clinical Case: A swelling in the anterior neck moves up during swallowing. Which structure is most likely involved? A. Submandibular gland B. Thyroid gland C. Sternocleidomastoid D. Internal jugular vein Correct Answer: B 23\. Pituitary Gland Q23. The anterior pituitary gland develops from: A. Neural ectoderm B. Surface ectoderm C. Endoderm D. Mesoderm Correct Answer: B Clinical Case: A patient presents with visual field defects (bitemporal hemianopia) and hormonal imbalances. Imaging shows a mass in the sella turcica. What is the most likely diagnosis? A. Pinealoma B. Craniopharyngioma C. Pituitary adenoma D. Meningioma Correct Answer: C 24\. Thyroid and Parathyroid Glands Q24. The pyramidal lobe of the thyroid gland is a remnant of: A. First pharyngeal pouch B. Thyroglossal duct C. Ultimobranchial body D. Second pharyngeal pouch Correct Answer: B Clinical Case: A child presents with a midline neck swelling that moves with swallowing and tongue protrusion. What is the most likely diagnosis? A. Branchial cyst B. Thyroglossal cyst C. Goiter D. Lymphadenopathy Correct Answer: B 1\. Introduction to Head and Neck Structures Q1. The posterior triangle of the neck is bounded anteriorly by: A. Sternocleidomastoid B. Trapezius C. Clavicle D. Mandible Correct Answer: A Clinical Case: A patient presents with a stab wound to the posterior triangle of the neck. Which structure is most likely injured? A. External jugular vein B. Facial artery C. Recurrent laryngeal nerve D. Superior thyroid artery Correct Answer: A 2\. Normae of the Skull Q2. The external occipital protuberance is part of which norma? A. Norma frontalis B. Norma lateralis C. Norma basalis D. Norma occipitalis Correct Answer: D Clinical Case: A fracture involving the pterion of the skull is most likely to damage which vessel? A. Middle meningeal artery B. Facial artery C. Vertebral artery D. Occipital artery Correct Answer: A 3\. Osteology of Mandible and Hyoid Q3. The mandible articulates with the skull at the: A. Maxilla B. Zygomatic arch C. Temporal bone D. Occipital bone Correct Answer: C Clinical Case: A child with Pierre Robin sequence has a severely underdeveloped mandible. This anomaly primarily affects which process of development? A. Secondary palate formation B. Neural tube closure C. Mesenchymal proliferation in the first arch D. Ossification of the hyoid bone Correct Answer: C 4\. The Scalp Q4. Which layer of the scalp contains the blood vessels and nerves? A. Skin B. Connective tissue C. Aponeurosis D. Loose areolar tissue Correct Answer: B Clinical Case: A deep laceration to the scalp results in gaping due to damage to which layer? A. Skin B. Connective tissue C. Aponeurosis D. Periosteum Correct Answer: C 5\. Face Q5. The main sensory nerve of the face is: A. Facial nerve B. Trigeminal nerve C. Glossopharyngeal nerve D. Hypoglossal nerve Correct Answer: B Clinical Case: A patient presents with Bell\'s palsy, showing drooping of the corner of the mouth. This is due to damage to which nerve? A. Trigeminal nerve B. Facial nerve C. Hypoglossal nerve D. Accessory nerve Correct Answer: B 6\. Pharyngeal Apparatus (Embryology) Q6. The first pharyngeal pouch gives rise to: A. Palatine tonsils B. Auditory tube C. Parathyroid gland D. Thyroid gland Correct Answer: B Clinical Case: A patient has a branchial fistula that discharges from the lateral neck. It is most likely derived from which embryological structure? A. First pharyngeal cleft B. Second pharyngeal cleft C. Fourth pharyngeal cleft D. Sixth pharyngeal cleft Correct Answer: B 7\. Development of the Face (Embryology) Q7. The philtrum of the lip is derived from the: A. Lateral nasal prominence B. Medial nasal prominence C. Maxillary prominence D. Mandibular prominence Correct Answer: B Clinical Case: A child is born with cleft lip. This condition results from failure of fusion between which two structures? A. Maxillary and mandibular prominences B. Maxillary and medial nasal prominences C. Lateral and medial nasal prominences D. Lateral nasal and maxillary prominences Correct Answer: B 8\. Orbital Boundaries and Lacrimal Apparatus Q8. The medial wall of the orbit is formed by all EXCEPT: A. Ethmoid bone B. Lacrimal bone C. Sphenoid bone D. Frontal bone Correct Answer: D Clinical Case: A patient has epiphora due to obstruction in the nasolacrimal duct. This structure drains into which part of the nasal cavity? A. Superior meatus B. Middle meatus C. Inferior meatus D. Sphenoethmoidal recess Correct Answer: C 9\. Eyeball and Extra-Ocular Muscles Q9. The superior oblique muscle is innervated by: A. Oculomotor nerve B. Trochlear nerve C. Abducent nerve D. Facial nerve Correct Answer: B Clinical Case: A patient with a lesion of the abducens nerve will have difficulty moving the eye in which direction? A. Upward B. Downward C. Medially D. Laterally Correct Answer: D 10\. Ear Q10. The ossicles of the middle ear include all EXCEPT: A. Malleus B. Incus C. Stapes D. Cochlea Correct Answer: D Clinical Case: A patient has conductive hearing loss due to fixation of the stapes. This condition is referred to as: A. Otosclerosis B. Otitis media C. Meniere's disease D. Vestibular neuritis Correct Answer: A 11\. Temporal and Infratemporal Fossae Q11. Which artery is a content of the infratemporal fossa? A. External carotid artery B. Maxillary artery C. Superficial temporal artery D. Vertebral artery Correct Answer: B Clinical Case: A patient with severe facial pain is diagnosed with trigeminal neuralgia. The nerve involved passes through which fossa? A. Temporal fossa B. Infratemporal fossa C. Pterygopalatine fossa D. Submandibular fossa Correct Answer: B 1\. Cranial Nerves Clinical Scenario: A patient presents with hoarseness of voice and difficulty swallowing. On examination, there is loss of sensation in the pharynx and impaired gag reflex. Which cranial nerve is likely affected? A. Vagus nerve (CN X) B. Glossopharyngeal nerve (CN IX) C. Hypoglossal nerve (CN XII) D. Facial nerve (CN VII) Correct Answer: B Clinical Scenario: A patient exhibits facial asymmetry, inability to close the eye on one side, and drooping of the corner of the mouth. These findings suggest damage to which nerve? A. Trigeminal nerve (CN V) B. Facial nerve (CN VII) C. Hypoglossal nerve (CN XII) D. Vagus nerve (CN X) Correct Answer: B 2\. Temporomandibular Joint and Muscles of Mastication Clinical Scenario: A patient complains of pain and clicking sounds in the temporomandibular joint during jaw movements. Which muscle is most likely involved in the disorder? A. Masseter B. Temporalis C. Lateral pterygoid D. Medial pterygoid Correct Answer: C Q1. The movements of the temporomandibular joint include all EXCEPT: A. Protrusion B. Retraction C. Flexion D. Depression Correct Answer: C 3\. Pharyngeal Apparatus Clinical Scenario: A neonate presents with a midline neck swelling that moves with swallowing. This condition is most likely related to which embryological structure? A. Second pharyngeal pouch B. Thyroglossal duct C. First pharyngeal arch D. Fourth pharyngeal cleft Correct Answer: B Clinical Scenario: A patient with a lateral neck mass anterior to the sternocleidomastoid muscle is diagnosed with a branchial cyst. This anomaly is due to incomplete obliteration of which structure? A. First pharyngeal pouch B. Second pharyngeal cleft C. Third pharyngeal pouch D. Fourth pharyngeal cleft Correct Answer: B 4\. Face and its Neurovascular Supply Clinical Scenario: A patient undergoes surgery for parotid gland tumor. Post-operatively, they are unable to smile symmetrically. Which nerve was likely injured? A. Trigeminal nerve B. Facial nerve C. Glossopharyngeal nerve D. Hypoglossal nerve Correct Answer: B Q1. The artery that primarily supplies the face is the: A. Facial artery B. Maxillary artery C. External carotid artery D. Superficial temporal artery Correct Answer: A 5\. Orbit and Extraocular Muscles Clinical Scenario: A patient presents with diplopia and inability to abduct their right eye. Which cranial nerve is most likely damaged? A. Oculomotor nerve (CN III) B. Trochlear nerve (CN IV) C. Abducens nerve (CN VI) D. Optic nerve (CN II) Correct Answer: C Clinical Scenario: A patient with ptosis, a dilated pupil, and a downward-and-outward gaze is diagnosed with damage to which cranial nerve? A. CN II B. CN III C. CN IV D. CN VI Correct Answer: B 6\. Development of Face Clinical Scenario: A neonate is diagnosed with unilateral cleft lip. This condition arises due to failure of fusion between which two structures? A. Maxillary and mandibular prominences B. Maxillary and medial nasal prominences C. Lateral nasal and medial nasal prominences D. Lateral nasal and maxillary prominences Correct Answer: B Q1. The philtrum of the upper lip is formed by the: A. Lateral nasal prominence B. Medial nasal prominence C. Maxillary prominence D. Mandibular prominence Correct Answer: B 7\. Salivary Glands Clinical Scenario: A patient with a history of recurrent parotitis presents with pain and swelling over the parotid region. Examination shows a stone in the duct. Which duct is affected? A. Stensen's duct B. Wharton's duct C. Rivinus duct D. Bartholin's duct Correct Answer: A Clinical Scenario: A tumor in the submandibular gland causes swelling in the floor of the mouth. Which nerve is at risk during surgery for excision of this gland? A. Lingual nerve B. Hypoglossal nerve C. Mandibular nerve D. Facial nerve Correct Answer: A 8\. Thyroid Gland and Development Clinical Scenario: A patient presents with a midline swelling in the neck that moves upward on swallowing. Ultrasound confirms a thyroglossal cyst. From which embryological structure does this arise? A. Second pharyngeal pouch B. Thyroglossal duct C. Foramen cecum D. Ultimobranchial body Correct Answer: B Q1. The thyroid gland develops from which embryological germ layer? A. Ectoderm B. Mesoderm C. Endoderm D. Neural crest cells Correct Answer: C 9\. Triangles of the Neck Clinical Scenario: A trauma patient has a stab wound in the posterior triangle of the neck. Which structure is most likely injured? A. Subclavian artery B. Brachial plexus C. Common carotid artery D. Internal jugular vein Correct Answer: B Q1. The carotid sheath contains all EXCEPT: A. Common carotid artery B. Internal jugular vein C. Vagus nerve D. Phrenic nerve Correct Answer: D 10\. Clinical Integration Questions Clinical Scenario: A patient with advanced oral carcinoma has metastasis to the neck nodes. Which group of lymph nodes is most likely involved first? A. Deep cervical nodes B. Submandibular nodes C. Submental nodes D. Occipital nodes Correct Answer: A Clinical Scenario: A patient has difficulty swallowing, and imaging shows compression of the esophagus by an enlarged thyroid gland. Which anatomical structure is at risk during thyroidectomy? A. Recurrent laryngeal nerve B. Internal carotid artery C. External jugular vein D. Hypoglossal nerve Correct Answer: A 1\. Oral Cavity and Muscles Clinical Scenario: A patient complains of difficulty in chewing and speaking. On examination, there is atrophy of the tongue muscle on one side. Which muscle is most likely affected? A. Genioglossus B. Hyoglossus C. Styloglossus D. Palatoglossus Correct Answer: A Q1. The mucosa of the oral cavity is lined by: A. Simple columnar epithelium B. Stratified squamous epithelium C. Pseudostratified columnar epithelium D. Transitional epithelium Correct Answer: B 2\. External Ear and Middle Ear Clinical Scenario: A patient complains of earache, fever, and hearing loss. Otoscopic examination reveals a bulging tympanic membrane with signs of infection. Which condition is most likely? A. Otitis externa B. Otitis media C. Tympanic membrane perforation D. Acoustic neuroma Correct Answer: B Q1. The stapedius muscle, which dampens loud sounds, is innervated by: A. Glossopharyngeal nerve (CN IX) B. Vagus nerve (CN X) C. Facial nerve (CN VII) D. Trigeminal nerve (CN V) Correct Answer: C 3\. Scalp and Neurovascular Supply Clinical Scenario: A patient presents with a scalp laceration. You notice that the bleeding is profuse, despite the wound not being very large. What is the most likely reason for the excessive bleeding? A. Scalp is highly vascularized B. Veins in the scalp lack valves C. The arteries are fixed and do not constrict D. The scalp is poorly innervated Correct Answer: A Q1. The primary artery supplying the scalp is the: A. Superficial temporal artery B. Occipital artery C. Facial artery D. Maxillary artery Correct Answer: A 4\. Pharyngeal Apparatus and Development Clinical Scenario: A patient presents with a cleft palate and bifid uvula. Which embryological structure failed to fuse properly during development? A. Lateral nasal processes B. Medial nasal processes C. Palatine shelves D. Maxillary processes Correct Answer: C Q1. The pharyngeal arches develop into all of the following EXCEPT: A. Muscles of facial expression B. Bones of the middle ear C. Muscles of mastication D. Muscles of the tongue Correct Answer: D 5\. Paranasal Sinuses and Nose Clinical Scenario: A patient with chronic sinusitis presents with pain over the cheek and nasal congestion. Radiographic imaging reveals an enlarged maxillary sinus. Which structure is at risk due to its proximity to the maxillary sinus? A. Nasolacrimal duct B. Inferior alveolar nerve C. Facial nerve D. Internal carotid artery Correct Answer: B Q1. The anastomoses at Little\'s area in the nasal cavity are clinically significant because they: A. Provide collateral circulation in cases of nasal congestion B. Facilitate drainage of the lacrimal fluid C. Are involved in olfaction D. Drain the paranasal sinuses Correct Answer: A 6\. Temporomandibular Joint (TMJ) Clinical Scenario: A patient presents with a history of jaw clicking and pain while chewing. The clicking occurs when the jaw is moved in the lateral direction. Which muscle is most likely involved? A. Masseter B. Lateral pterygoid C. Temporalis D. Medial pterygoid Correct Answer: B Q1. The disc of the temporomandibular joint is stabilized by: A. Stylomandibular ligament B. Sphenomandibular ligament C. Lateral ligament D. Temporomandibular ligament Correct Answer: C 7\. Larynx and Voice Clinical Scenario: A patient with a history of chronic smoking presents with hoarseness and difficulty speaking. Laryngoscopy shows lesions on the vocal cords. Which nerve is responsible for innervating the vocal cords? A. Vagus nerve (CN X) B. Glossopharyngeal nerve (CN IX) C. Hypoglossal nerve (CN XII) D. Accessory nerve (CN XI) Correct Answer: A Q1. The cricothyroid muscle, which alters tension of the vocal cords, is innervated by: A. External branch of the superior laryngeal nerve B. Recurrent laryngeal nerve C. Vagus nerve (CN X) D. Glossopharyngeal nerve Correct Answer: A 8\. TMJ and Muscles of Mastication Clinical Scenario: A patient presents with difficulty chewing and pain in the jaw. MRI reveals a displaced disc in the temporomandibular joint. Which muscle action is most likely compromised? A. Elevation of the mandible B. Protrusion of the mandible C. Depression of the mandible D. Lateral movement of the mandible Correct Answer: B Q1. The primary function of the lateral pterygoid muscle is: A. Elevation of the mandible B. Retraction of the mandible C. Protrusion of the mandible D. Depression of the mandible Correct Answer: C 9\. Thyroid and Parathyroid Glands Clinical Scenario: A patient with a history of neck surgery presents with symptoms of hypocalcemia, including tingling and muscle spasms. Which gland is most likely to have been injured during surgery? A. Thyroid gland B. Parathyroid gland C. Pituitary gland D. Adrenal gland Correct Answer: B Q1. The parathyroid glands develop from: A. First pharyngeal pouch B. Third and fourth pharyngeal pouches C. Thyroglossal duct D. Neural crest cells Correct Answer: B 10\. Cervical Vertebrae and Neck Muscles Clinical Scenario: A patient presents with restricted neck movement following trauma. Imaging reveals a fracture of the cervical vertebra. Which feature is characteristic of a typical cervical vertebra? A. Bifid spinous process B. Large body C. Short transverse process D. No transverse foramen Correct Answer: A Q1. The anterior scalene muscle attaches to the: A. First rib B. Second rib C. Clavicle D. Manubrium Correct Answer: A