This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Colon and Rectum - Polyps and Carcinoma, Subject name: Surgery
Most common site of CA colon is - 
Select and explain. 
A. Rectosigmoid Region, B. Ascending Colon, C. Descending Colon, D. Transverse Colon
A: Rectosigmoid Region
Answer: A: Rectosigmoid Region 
Explanation: Ans. is 'a' i.e., Rectosigmoid Region o The most common site for carcinoma colon is rectosigmoid.SITEFREQUENCYRECTUM38%SIGMOID COLON21%CAECUM12%TRANSVERSE COLON5.5%DESCENDING COLON4%SPLENIC FLEXURE3%ASCENDING COLON5%