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': "A i.e. Siffness of finger \nSelect and explain. \nA. Malunion, B. Non-union, C. Sudeck's osteodystrophy, D. Stiffness of fingers", 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Siffness of finger', 'role': 'assistant'}]