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
Which of the following represents the optimal age of cleft palate repair? 
Select and explain. 
A. 3 months, B. 3 - 6 months, C. 6 - 18 months, D. 24 months
C: 6 - 18 months
Answer: C: 6 - 18 months 
Explanation: Cleft palate is usually repaired when the infant is between 6 - 18 months of age. Optimal time of cleft lip repair follows the rule of 10 which includes a body weight of 10lb or more, hemoglobin of 10mg/dl or more and age after 10 weeks of life. Reference: Schwaz 's Principles of Surgery 9e chapter 45.