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': 'If pre-surgical movement of maxillary segments is indicated in a cleft infant, it is done beginning at: \nSelect and explain. \nA. 3 to 6 weeks of age, B. 10 to 12 weeks of age, C. 3 to 6 months of age, D. 10 to 12 months of age', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]