This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
[{'content': 'Unilateral clefts are more common on \nSelect and explain. \nA. Left side, B. Right side, C. Median, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Distribution of cleft lip and cleft palate In unilateral cleft lip the deformity affects left side in 60% cases Typical distribution of cleft types Cleft lip alone :15% Cleft lip & palate :45% (MC) Isolated cleft palate :40% Ref: Sabiston 20th edition Pgno :1946-1947', 'role': 'assistant'}]