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 of the following is the etiological factor for the disease 'Bagassosis'? \nSelect and explain. \nA. Cotton, B. Sugarcane fibres, C. Carbon paicles, D. Silica fibres", 'role': 'user'}, {'content': "Answer: B \nExplanation: Bagassosis is an occupational disease of the lung caused by inhalation of bagasse or sugar-cane dust. It is due to a thermophilic actinomycete. The symptoms consist of breathlessness, cough, hemoptysis and slight fever. If left untreated, there is diffuse fibrosis, emphysema, and bronchiectasis. By keeping the moisture content above 20% and spraying the bagasse with 2% propionic acid, bagasse can be rendered safe for manufacturing use. Ref: Park's Textbook of Social and Preventive Medicine, 19th edition, Page 661-662.", 'role': 'assistant'}]