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 is claimed to be the most successful treatment for cleft palate? 
Select and explain. 
A. Mirault Blair operation., B. Miller's rotation advancement., C. Langenbeck's operation., D. None
C: Langenbeck's operation.
Answer: C: Langenbeck's operation. 
Explanation: Langenbeck and Wardill's four flap operations are for the repair of cleft palate