Which of the following comprise seven bones?

Correct Answer: A

Rationale: Cervical vertebrae number 7 (C1-C7). Carpals are 8 per wrist, cranial bones are 8, lumbar vertebrae are 5. Answer is A, per the document.

Correct Answer: D

Rationale: Compact bone has osteons (Haversian systems) with lamellae, osteocytes, and canaliculi, but no trabeculae (spongy bone feature). Answer is D, per the document.

Correct Answer: D

Rationale: Cancellous (spongy) bone has trabeculae (beams) and lamellae with osteocytes, but no osteons (compact bone feature). Answer is D, per the document.

Correct Answer: B

Rationale: Manubrium (top) and xiphoid process (bottom) are parts of the sternum (breastbone), not jaw, pelvis, or hand. Answer is B, per the document.

Correct Answer: D

Rationale: Axial skeleton: skull (cranial/facial), thoracic cage (ribs, sternum), vertebral column. A and B include appendicular parts, C adds girdles (appendicular). Answer is D, per the document.