Which statement about the ankle is true?

• A. It is a bone in the foot
• B. It is a tendon around the ankle
• C. It is the ankle joint between the tibia and talus
• D. It is not a bone; it is a joint between the leg and the foot

Answer: (D)

Think of the ankle as a joint, not a single bone. The leg bones—the tibia and fibula—form a socket (the mortise) that sits on the top of the foot’s main bone, the talus. The ankle joint is where these bones meet, allowing up-and-down movement as you walk. So saying the ankle is not a bone and is a joint between the leg and the foot is the accurate description. The other ideas don’t fit: it isn’t a tendon, and while the tibia interacts with the talus, the fibula also participates in the ankle joint, so describing it as just between tibia and talus is incomplete.