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: Social & Preventive Medicine
[{'content': 'The association between oral cancer and tobacco chewing was found to be as follows \nSelect and explain. \nA. 0.65, B. 0.8, C. 1.3, D. 2.25', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]