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': 'Bagassosis is due to inhalation of \nSelect and explain. \nA. Cotton dust, B. Sugarcane dust, C. Tobacco dust, D. Rice barn dust', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]