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
Cleft lip is operated at what age 
Select and explain. 
A. 1 month, B. 6 months, C. 10 weeks, D. 1 year
C: 10 weeks
Answer: C: 10 weeks 
Explanation: None