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': "Complications of Colles' fracture are all except \nSelect and explain. \nA. Malunion, B. Non union, C. Sudeck's dystrophy, D. Rupture of extensor policis longus", 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Nonunion', 'role': 'assistant'}]