This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Gastrointestinal System Including Diarrhea, Subject name: Pediatrics
[{'content': 'Chronic constipation in children is seen in all EXCEPT: \nSelect and explain. \nA. Hirschsprung disease, B. Jejunal polyp, C. Hypothyroidism, D. Stricture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Jejunal polyp- abdominal pain, malena, intestinal obstruction Chronic constipation in children: Hirschsprung disease Hypothyroidism Stricture', 'role': 'assistant'}]