This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Large intestine, Subject name: Surgery
[{'content': 'Most common site of post ischemic stricture is: \nSelect and explain. \nA. Ascending colon, B. Hepatic flexure, C. Splenic flexure, D. Sigmoid colon', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Stricture is a complication of colonic ischemia. Most common site is sigmoid colon.', 'role': 'assistant'}]