An abnormal lateral curvature of the spine is

Correct Answer: B

Rationale: Scoliosis is an abnormal lateral (side-to-side) spine curvature. Kyphosis is forward curvature, lordosis is inward, and hunchback is colloquial for kyphosis, making 'scoliosis' correct.

Correct Answer: C

Rationale: The ischium, the lower posterior part of the coxal bone, is the most inferior, forming the sitz bones. The ilium is superior, pubis anterior, and acetabulum central, making 'Ischium' correct.

Correct Answer: A

Rationale: The coxal bone comprises ilium, ischium, and pubis, fusing at the acetabulum. The sacrum is a separate pelvic bone, not part of the coxal bone, making 'sacrum' correct.

Correct Answer: D

Rationale: Freely movable joints are synovial (e.g., knee) and termed diarthrotic. Cartilaginous joints are slightly movable, so 'Both B and C are correct' reflects the synonymy of synovial and diarthrotic.

Correct Answer: C

Rationale: Flapping arms involves abduction (raising arms laterally) and adduction (lowering them), mimicking wings. Flexion/extension bends/straightens, supination/pronation rotates, and elevation/depression is shoulders, making 'abduction and adduction' correct.