This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
[{'content': 'Most common site for colorectal cancer is \nSelect and explain. \nA. Rectum, B. Anal canal, C. Spleenic flexure, D. Appendix', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans is 'a' i.e., Rectum * Following image demonstrates the distribution of colorectal adenocarcinoma:* Thus the most common site is Rectum. (rectum> sigmoid colon> caecum).", 'role': 'assistant'}]