This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Anatomy
Farmers lung is caused due to exposure to 
Select and explain. 
A. Bacillus subtilis, B. Thermoactinomyces saccharri, C. Aspergillus fumigates, D. Penicillium nalgiovense
B: Thermoactinomyces saccharri
Answer: B: Thermoactinomyces saccharri 
Explanation: Farmer's Lung This condition results from exposure to moldy hay containing spores of thermophilic actinomycetes that produce a hypersensitivity pneumonitis. Ref Harrison 19th edition 1691