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': 'Which of the following is ideal time for repair of cleft palate? \nSelect and explain. \nA. 9-12 months, B. 2-3 years, C. 5-6 years, D. 18-24 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]