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': 'Cleft lip is operated at what age \nSelect and explain. \nA. 1 month, B. 6 months, C. 10 weeks, D. 1 year', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]