This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Sciatic nerve palsy may occur a complication following which injury? \nSelect and explain. \nA. Trochanteric fracture, B. Fracture neck of femur, C. Posterior dislocation of hip joint, D. Anterior dislocation of hip joint', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In posterior hip dislocation, head of femur is pushed out of the acetabulum posteriorly. Since the sciatic nerve lies behind the posterior wall of the acetabulum it is damaged in posterior hip dislocation. Ref: Essential Ohopedics By Maheshwari, 2nd Edition, Pages 111-119.', 'role': 'assistant'}]