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: Pediatrics
[{'content': 'Chronic constipation in children is seen in all A/E? \nSelect and explain. \nA. Hirschspring disease, B. Jejunal polyp, C. Hypothyroidism, D. Stricture', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Jejunal polyp", 'role': 'assistant'}]