Which of the following bones is not a major bone of the leg?

The correct answer identifies the spinal column as not being a major bone of the leg. The primary bones that make up the structure of the leg are the femur, tibia, and fibula.

The femur is the largest and strongest bone in the body, forming the upper part of the leg and connecting to the pelvis at the hip joint. The tibia and fibula make up the lower leg, with the tibia being the larger, weight-bearing bone and the fibula running alongside it for support and stability.

In the other choices, the presence of only leg bones—such as the tibia and fibula—ensures that these selections pertain to the skeletal structure of the leg. The spinal column, while crucial to overall skeletal structure and function, is not part of the leg itself, which is why it is correctly identified as not a major bone of the leg.