<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 31-year-old woman presents with difficulty walking and climbing stairs for the last 3 weeks. She has no history of trauma. The physical examination reveals a waddling gait with the trunk swaying from side-to-side towards the weight-bearing limb. When she stands on her right leg, the pelvis on the left side falls, but when she stands on the left leg, the pelvis on the right side rises. Which of the following nerves is most likely injured in this patient?? A: Right superior gluteal nerve, B: Right femoral nerve, C: Right inferior gluteal nerve, D: Right obturator nerve, E: Left femoral nerve,  <response>: This is a clinical vignette describing a 31-year-old woman with difficulty walking and climbing stairs, as well as a waddling gait and pelvic tilt when standing on each leg. This presentation is most consistent with Trendelenburg gait, which occurs due to weakness of the hip abductors on the affected side. The hip abductors gluteus medius and minimus are innervated by the superior gluteal nerve. Therefore, injury to this nerve would cause hip abductor weakness and a Trendelenburg gait.Choices A and C involve the right superior and inferior gluteal nerves, which would cause right-sided hip abductor weakness and explain the pelvic tilt when standing on the right leg. Choice E involves the left femoral nerve, which innervates the quadriceps and would not cause this presentation. Choices B and D involve the right femoral and obturator nerves, which innervate thighhip adductors and medial thigh muscles, respectively. Injury to these nerves would not cause abductor weakness.Therefore, the right superior gluteal nerve choice A is most likely injured in this patient.A: Right superior gluteal nerve 