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: Microbiology
Farmers lung is caused by - 
Select and explain. 
A. Micromonospore faenia, B. Aspergillosis, C. Histoplasma capsulatam, D. All of the above
A: Micromonospore faenia
Answer: A: Micromonospore faenia 
Explanation: Ans. is 'a' i.e., Micromonospore faenia Spores of some thermophilic actinomycetes such as faenia and Saccharomonsporia species may induce allergic alveolitis leading to COPD,farmer's lung.