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
[{'content': 'Cleft palate should be repaired \nSelect and explain. \nA. After 5 years of age, B. Before 1 year, C. 1½ to 2 years, D. Any time', 'role': 'user'}, {'content': "Answer: B \nExplanation: Cleft palate is usually repaired in 12–18 months. Early repair causes retarded maxillary growth (probably due to trauma to growth center and periosteum of the maxilla during surgery if done early). Late repair causes speech defect.\xa0\nAbnormal insertion of tensor palati is released.\xa0\nWardill- Kilner push back operation—by raising mucoperiosteum flaps based on greater palatine vessels.\xa0\nThe exact timing of repair of a palate cleft is controversial. In general, the velum must be closed before the development\xa0 of\xa0 speech\xa0 sounds\xa0 that\xa0 require\xa0 an\xa0 intact\xa0 palate.\n\nReference: SRB's Manual of Surgery, 5th ed, page no 350, Fonseca 4th ed page no 503", 'role': 'assistant'}]