Which of the following bones is not in the leg?

The radius is not in the leg because it is one of two bones in the forearm, along with the ulna. The leg consists of the femur (thigh bone), patella (kneecap), tibia (shinbone), and fibula. These bones make up the skeletal structure of the leg, while the radius is located in the forearm and plays a role in the movement and support of the arm. Its main function is to allow rotation of the forearm and to stabilize the wrist joint. Therefore, the radius is not considered to be part of the leg.