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': 'Commonest complication of Trans-cervical fracture of femur is - \nSelect and explain. \nA. Non union, B. Malunion, C. Avascular necrosis, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: AVN is the most common complication of femoral neck fracture.', 'role': 'assistant'}]