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: Medicine
[{'content': 'A 65 year old man has stools positive for occult blood which of the following is most likely location of bowel cancer \nSelect and explain. \nA. Sigmoid, B. Transverse colon, C. Appendix, D. Ascending colon', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Distal colon cancers are M/C.', 'role': 'assistant'}]