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 is more common in occurrence 
Select and explain. 
A. Cleft palate only, B. Cleft lip only, C. Cleft lip and palate, D. All of the above have equal occurrence
C: Cleft lip and palate
Answer: C: Cleft lip and palate 
Explanation: The typical distribution of cleft types is:

Cleft lip alone: 15%;
Cleft lip and palate: 45%;
Isolated cleft palate: 40%.