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': 'Avascular necrosis of head of femur occurs commonly at: \nSelect and explain. \nA. Transcervical region, B. Trochanteric region, C. Subcapital region, D. Subchondral region', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Subcapital', 'role': 'assistant'}]