This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intestinal Obstruction, Subject name: Surgery
[{'content': "All are common causes of ileal obstruction except? \nSelect and explain. \nA. Adhesions, B. Obstructed hernia, C. Stricture, D. Hirschsprung's disease", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. (d) Hirschsprung's DiseaseRef.:Manipal Manual of surgery, 4th ed./731Common causes of ileal obstructionCommon causes of colonic obstruction* Adhesions* Obstructed hernia* Stricture* Intussusception* lleocaecalTB* Bands* Fecal impaction* Carcinoma colon* Hirschsprung's disease* Anorectal malformations", 'role': 'assistant'}]