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: Surgery
Most common site of bleeding diveicula 
Select and explain. 
A. Sigmoid colon, B. Descending colon, C. Rectum, D. Ascending colon
A: Sigmoid colon
Answer: A: Sigmoid colon 
Explanation: Diveicula most commonly affect the sigmoid colon and are confined to sigmoid colon in approximately 50% of patients with diveiculosis. Segment of sigoid colon is having smallest luminal diameter, and so colonic pressure as high as 90mm Hg can be generated. Reference : Sabiston, Textbook of Suregery, 19th Edition, page no = 1310.