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 site for Ca. Large bowel  is 
Select and explain. 
A. Sigmoid, B. Rectum, C. Ascending colon, D. Descending colon
B: Rectum
Answer: B: Rectum 
Explanation: Rectum is most common location. (if option is not given then retco - sigmoid region).