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
A farmer working in the sugar cane industry comes to you for advice on how to prevent fungal infection (bagassosis) of the lung. His elder brother was diagnosed to have bagassosis 1 month ago. You would advise him to spray the sugar cane with which of the following? 
Select and explain. 
A. 2% formic acid, B. 2% acetic acid, C. 2% propionic acid, D. 10% hypochlorite solution
C: 2% propionic acid
Answer: C: 2% propionic acid 
Explanation: Bagassosis is caused due to thermoactinomyces sacchari. The preventive measures include dust control, personal protection using masks etc. Pre Placement medical assessment followed by periodical medical check up and spraying the bagasse with 2% propionic acid. Keeping the humidity over 20% is also helpful. Ref: Park, Edition 21, Page - 747, 748