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': 'Byssinosis is due to exposure of ? \nSelect and explain. \nA. Coal dust, B. Cotton dust, C. Sugarcane dust, D. Silica', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Cotton dust Byssinosis is due to exposure to cotton dust in textile industries.", 'role': 'assistant'}]