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: Orthopaedics
[{'content': 'AVN of femoral head is most common in- \nSelect and explain. \nA. Intracapsular fracture neck of femur, B. Extracapsular fracture neck of femur, C. Subtrochanteric fracture, D. Fracture shaft humerus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]