This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pelvis and Hip injuries, Subject name: Orthopaedics
[{'content': 'Sciatic nerve palsy may occur in the following injury- \nSelect and explain. \nA. Posterior dislocation of hip joint, B. Fracture neck of femur, C. Trochanteric fracture, D. Anterior dislocation of hip', 'role': 'user'}, {'content': 'Answer: A \nExplanation: *Injury to sciatic nerve:-The nerve is vulnerable to injury where it lies behind the posterior wall of acetabulum. Ref: Maheshwari 9th/e p.131 &4th/e p.127', 'role': 'assistant'}]