A Particular Muscle Causes Flexion of the Lower Limb at the Knee

Multiple Choice

A particular muscle causes flexion of the lower limb at the knee.  It is located on the posterior side of the thigh.  Where would you expect to find its antagonist?

A) On the medial side of the thigh
B) On the anterior side of the thigh
C) On the lateral side of the thigh
D) On the posterior side of the thigh too
E) On any side of the thigh