Which muscle flexes the hip and medially rotates the hip, while also supporting the knee joint?

• A. Tensor Fasciae Latae
• B. Iliopsoas
• C. Sartorius
• D. Gluteus Maximus

Answer: (A)

The tensor fasciae latae performs hip flexion and medial (inward) rotation, and it also helps stabilize the knee through its connection to the iliotibial band. When this muscle contracts, it pulls the thigh forward and rotates it inward as the hip flexes. The tendon blends into the iliotibial tract that runs down the outer thigh to the lateral side of the knee; tension in that band provides lateral knee stabilization during weight-bearing and movement, giving the knee additional support. Other muscles listed don’t combine these actions in the same way: the iliopsoas mainly drives hip flexion, the sartorius is a helper with knee actions but isn’t a primary knee stabilizer, and the gluteus maximus is a hip extensor and lateral rotator rather than a hip flexor or medial rotator.