Haversian canals occur in

Correct Answer: A

Rationale: Haversian canals are channels in compact bone containing blood vessels and nerves, characteristic of long bones like the humerus. Scapula (flat), pubis (irregular), and clavicle (long but less typical) have compact bone, but the humerus is a classic example of Haversian system structure.

Correct Answer: C

Rationale: The human skull comprises 22 bones: 8 cranial bones (protecting the brain) and 14 facial bones (structuring the face). 2 is far too low (perhaps confusing cranial/facial sections), and 12 undercounts the total.

Correct Answer: B

Rationale: The foramen magnum, located in the occipital bone, is the large opening at the skull’s base through which the spinal cord passes to connect with the brainstem. 'Maximum' is not an anatomical term here.

Correct Answer: B

Rationale: The nucleus pulposus, the inner core of an intervertebral disc, is gelatinous and elastic, allowing flexibility and shock absorption. The anulus fibrosus, the outer fibrous ring, is tougher and less elastic, providing strength.

Correct Answer: B

Rationale: The clavicle’s sternal end articulates with the manubrium (sternum), and its acromial end joins the scapula’s acromion, forming the shoulder’s structure. 'Sternal/acromial' matches this medial-to-lateral orientation.