The Anterior Thigh Is Comprised of a Group of Muscles

Multiple Choice

The anterior thigh is comprised of a group of muscles commonly referenced as the quadriceps. These four muscles - the rectus femoris, vast us medial is, vast us lateral is and vast us intermedius -- all operate on the knee to produce extension. However, only one of the muscles also produces hip flexion. Which one?

A) Vast us medial is
B) Vast us lateral is
C) Vast us intermedius
D) Rectus femoris