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
If pre-surgical movement of maxillary segments is indicated in a cleft infant, it is done beginning at: 
Select and explain. 
A. 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
A: 3 to 6 weeks of age
Answer: A: 3 to 6 weeks of age 
Explanation: None