Hip flexor muscles.

• A. Iliacus, psoas major and rectus femoris
• B. Gluteus maximus and gluteus medius
• C. Tensor fasciae latae
• D. Sartorius and gracilis

Answer: (A)

The main idea here is which muscles actively bring the thigh toward the trunk by bending at the hip joint. The strongest and most direct hip flexors are the iliacus and psoas major, which together form the iliopsoas, plus the rectus femoris. These muscles cross the hip joint on the anterior side and contract to lift the thigh forward. That combination—iliacus, psoas major, and rectus femoris—covers the primary action of flexing the hip, making them the best answer.

Other muscles listed don’t primarily flex the hip. The gluteus maximus and gluteus medius mainly extend the hip and move it in abduction or rotation, not flexion. The tensor fasciae latae can assist with hip flexion, but it is not a primary hip flexor. The sartorius and gracilis cross the hip as well and can contribute to flexion, but they are more of accessory flexors and more notable for their roles in combined movements like knee flexion, abduction, or rotation, rather than acting as the main hip flexors.