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
[{'content': 'Which fungicide is used as a spray for the control of bagassosis – \nSelect and explain. \nA. 2% acetic acid, B. 2% formic acid, C. 2% propionic acid, D. 25% phenyl mercury', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Preventive measures for bagassosis\n\nDust control\xa0→\xa0Wet process, enclosed apparatus, exhaust ventilation.\nPersonal protection →\xa0Protective equipment (mask or respirators with mechanical filters).\nMedical control \xa0→\xa0Pre-placement examination and periodic medical check-up.\nBagasse control\xa0→ Keeping moisture above 20% and spraying the bagasse with 2% propionic acid, a widely used fungicide.', 'role': 'assistant'}]