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 is commoner in: March 2012 \nSelect and explain. \nA. Cuboid, B. Calcaneum, C. Navicular, D. Talus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: D i.e. Talus Because of the poor blood supply, after a fracture through the neck, the body of talus becomes avascular', 'role': 'assistant'}]