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': 'Cleft lip surgery is earliest done at \nSelect and explain. \nA. 3 months, B. 6 months, C. 9 months, D. 12 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref: Sabiston 20th edition Pgno : 1947 "Rule of 10s" by surgeon Wilhelmmensen and Musgrave Surgery is done in cleft lip in a child when Age >= 10 weeks Weight >= 10 pounds Hemoglobin >= 10 gm Management of cleft lip and cleft palate Surgical techniques are aimed at restoring normal anatomy Cleft lip Repaired between 3 and 6 months of age Cleft palate Repaired between 6 and 18 months', 'role': 'assistant'}]