<prompt> Most common site of bleeding diveiculaSigmoid colonDescending colonRectumAscending colon  <response>: 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. 