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: Pathology
[{'content': 'The adenomatous polypi of large bowel are most often situated in - \nSelect and explain. \nA. Ascending colon, B. Transverse colon, C. Descending colon, D. Sigmoid colon', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Sigmoid colon", 'role': 'assistant'}]