This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
[{'content': 'Failure of migration of neural crest cells is seen in: \nSelect and explain. \nA. Albinism, B. Congenital megacolon, C. Odontomes, D. Adrenal tumour', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: b (Congenital megacolon)Ref: Bailey & Love, 24th ed, p.l 153 & 23rd ed, p. 1027', 'role': 'assistant'}]