Which muscle extends the hip?

• A. Gluteus Maximus' Lower Fibers
• B. Posterior Fibers of Adductor Magnus
• C. Adductor Longus
• D. Gracilis

Answer: (B)

Extending the hip means moving the thigh backward at the hip joint. Among the muscles listed, the posterior (hamstring-like) portion of the adductor magnus is the part that extends the hip. This part runs from the ischial tuberosity and attaches down to the femur, and its action includes extending the hip as well as assisting in adduction. The other options tend to flex or adduct the hip: the gluteus maximus does extend the hip, but the phrase here points to the posterior fibers of adductor magnus as the extension-focused component within this set. Therefore, that posterior portion of adductor magnus best fits the action of extending the hip among the choices.