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
Most common site of post ischemic stricture is: 
Select and explain. 
A. Ascending colon, B. Hepatic flexure, C. Splenic flexure, D. Sigmoid colon
D: Sigmoid colon
Answer: D: Sigmoid colon 
Explanation: Stricture is a complication of colonic ischemia. Most common site is sigmoid colon.