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: None', 'role': 'assistant'}]