A
Gluteus medius and tensor fasciae latae
B
Sartorius and tensor fasciae latae
C
Gluteus maximus and gluteus medius
D
Rectus femoris and vastus lateralis
Explanation:The correct option is 'b'. The direct anterior (Smith-Petersen) approach exploits the true internervous and intermuscular plane between the sartorius (innervated by the femoral nerve) and the tensor fasciae latae (innervated by the superior gluteal nerve) superficially.
Reference: Hoppenfeld S, deBoer P, Buckley R. Surgical Exposures in Orthopaedics: The Anatomic Approach. 4th ed. Lippincott Williams & Wilkins; 2009.