This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiration, Subject name: Pathology
[{'content': "Causative agent for Farmers' Lung is? \nSelect and explain. \nA. Thermoactinomyces sacchari, B. Thermophiles actinomyces, C. Cotton dust, D. Pigeon feather", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Thermophiles actinomyces * Farmer's lung is a hypersensitivity (type III) pneumonitis induced by the inhalation of biologic dusts coming from hay dust or mold spores or any other agricultural products.* These types of immune response are most often initiated by exposure to thermophilic actinomycetes (most commonly Saccharopolyspora rectivirgula).", 'role': 'assistant'}]