Explanation:
The correct option is b. The direct lateral (Hardinge) approach involves splitting the anterior third or half of the gluteus medius muscle (along with the underlying gluteus minimus) and the vastus lateralis, reflecting this conjoined tendon anteriorly to expose the joint capsule. While this approach provides excellent acetabular exposure and carries an exceptionally low risk of posterior dislocation, the denervation (via superior gluteal nerve injury) or mechanical failure of the repaired gluteus medius can result in permanent abductor weakness and a debilitating postoperative Trendelenburg limp. Reference: Hardinge K. The direct lateral approach to the hip. J Bone Joint Surg Br.