Which of the following is included in the appendicular skeleton?

• A. Arms
• B. Facial bones
• C. Ribs
• D. Vertebral column

Answer: (A)

The main idea here is what parts of the skeleton are considered appendicular. The appendicular skeleton includes the limbs and the girdles that attach them to the body’s central axis. That means the upper limb—the arm, along with its forearm and hand—is part of this group, as is the lower limb and the shoulder and pelvic girdles that anchor them.

In contrast, facial bones, the ribs, and the vertebral column belong to the axial skeleton, which forms the body's central framework. So arms are included in the appendicular skeleton, while facial bones, ribs, and the vertebral column are not.