Identify the origin and insertion of tensor fasciae latae and its action.

• A. Origin: anterior iliac crest at the ASIS. Insertion: iliotibial tract. Action: flexes and medially rotates the hip; helps stabilize the knee via IT band.
• B. Origin: posterior iliac crest. Insertion: IT tract. Action: extends knee.
• C. Origin: iliac fossa. Insertion: gluteal tuberosity. Action: abducts thigh.
• D. Origin: pubic bone. Insertion: IT tract. Action: adducts thigh.

Answer: (A)