This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'All are true about gallstone ileus except \nSelect and explain. \nA. May be diagnosed with abdominal X-Ray, B. Most common fistula is to duodenum, C. Tumbling obstruction, D. Cholecystectomy should be done In same episode', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Most patients in Gallstone ileus are unstable to withstand a Prolonged operative procedure, so cholecystectomy should not be done in same episode Fistula can be addressed at a second laparotomy Ref: Sabiston 20th edition Pgno :1506-1507', 'role': 'assistant'}]