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': 'Byssinossis occurs with \nSelect and explain. \nA. Sugarcane fibers, B. Silica fibers, C. Cotton fibers, D. Carbon particles.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]