This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Facial Injuries and Abnormalities, Subject name: Surgery
[{'content': 'Commonest type of cleft lip is: \nSelect and explain. \nA. Bilateral cleft lip, B. Midline cleft lip, C. Cleft lip combined with cleft palate, D. Unilateral cleft lip', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Commonest type of cleft lip is cleft lip combined with cleft palate. The typical distribution of cleft types is: cleft lip alone: 15% cleft lip and palate: 45% Isolated cleft palate: 40% .', 'role': 'assistant'}]