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': 'Preferred time for cleft lip repair surgery is \nSelect and explain. \nA. 5 - 6 months, B. 6 - 12 months, C. 12 - 18 months, D. 12 - 24 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: U/L cleft lip :\xa05 - 6 months.\nBilateral cleft lip :\xa04 - 5 months.', 'role': 'assistant'}]