This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Most common cause of lower gastro intestinal bleeding is - 
Select and explain. 
A. Diverticulosis, B. Colorectal carcinoma, C. Angiodysplasia, D. Anal fissure
A: Diverticulosis
Answer: A: Diverticulosis 
Explanation: None