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': "Not a complication of Colles' fracture \nSelect and explain. \nA. Stiffness of wrist, B. Stiffness of shoulder, C. Carpal tunnel syndrome, D. Wrist drop", 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Wrist drop', 'role': 'assistant'}]