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 bone is most commonly seen in \nSelect and explain. \nA. Calcaneus, B. Cervical spine, C. Scaphoid, D. Scapula', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Scaphoid', 'role': 'assistant'}]