This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hospital waste and disaster management, Occupational health, Subject name: Social & Preventive Medicine
[{'content': '"Farmer\'s Lung" is due to inhalation of - \nSelect and explain. \nA. Cotton fiber, B. Sugarcane fiber, C. Hay dust, D. Coal dust', 'role': 'user'}, {'content': "Answer: C \nExplanation: - farmers lungs is due to the inhalation of mouldy or hay dust. - micropolyspora faeni is the main cause of farmer's lung. - repeated attacks cause pulmonary fibrosis, inevitable pulmonary damage and cor pulmonale. Reference: Park's textbook of preventive and social medicine, 23rd edition, pg no:807 <\\p>", 'role': 'assistant'}]