Which structures are part of the axial skeleton?

• A. Clavicle, scapula, pelvis, and femur
• B. Skull, spine, ribs, and sternum
• C. Shoulders, arms, hips, and legs
• D. Pelvis, sacrum, coccyx, and clavicle

Answer: (B)

The axial skeleton forms the central axis of the body and protects the brain, spinal cord, and thoracic organs. It includes the skull, vertebral column (spine), ribs, and sternum. That is why this set is correct: it lists only structures that belong to the axial skeleton. The other options mix in bones from the appendicular skeleton, which makes up the limbs and girdles used for movement, such as the clavicle, scapula, pelvis, and femur.