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
Which of the following is the etiological factor for the disease 'Bagassosis'? 
Select and explain. 
A. Cotton, B. Sugarcane fibres, C. Carbon paicles, D. Silica fibres
B: Sugarcane fibres
Answer: B: Sugarcane fibres 
Explanation: 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.