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 bleeding per rectum is 
Select and explain. 
A. Hemorrhoids, B. Fissure in ano, C. Diarrhea, D. Rectal polyp
A: Hemorrhoids
Answer: A: Hemorrhoids 
Explanation: Most common cause of bleeding per rectum is - hemorrhoids.
Most common cause of bleeding per rectum in children is - polyps.