Contraction of all the following muscles causes extension of the leg except:

The biceps femoris is part of the hamstring group in the posterior compartment of the thigh, and its primary functions include knee flexion and hip extension. When the biceps femoris contracts, it does not contribute to leg extension but rather works to flex the knee joint, especially when the hip is flexed. This is in contrast to the muscles listed as capable of extending the leg.

The rectus femoris, vastus intermedius, and vastus lateralis are all part of the quadriceps muscle group located in the anterior compartment of the thigh. These muscles work synergistically to extend the knee joint, making them essential for activities such as kicking, jumping, and standing up from a seated position. The rectus femoris additionally assists in hip flexion due to its origin on the ilium, but its primary role in this context is as a knee extensor.

In summary, while the rectus femoris, vastus intermedius, and vastus lateralis all contribute to the extension of the leg, the biceps femoris does not, making it the correct choice in this question.