This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'Smoking may be associated with all of the following cancers, except \nSelect and explain. \nA. Ca Larynx, B. Ca Nasopharynx, C. Ca Bladder, D. None', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans is None > Ca Nasopharynx', 'role': 'assistant'}]