This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Occupational Health, Subject name: Social & Preventive Medicine
Silicosis caused by- 
Select and explain. 
A. Gold, B. Coal, C. CO, D. Silica
D: Silica
Answer: D: Silica 
Explanation: Ans. is 'd' i.e.. Silica o Byssinosis is due to exposure to cotton dust in textile industries.AnthracosisSilicosisSiderosisByssinosisFarmer's lungSequousisSuberosisDetergent worker's lungBaggassosisCoal dustSilicaIronCotton dustHay or grain dustMoldy red wood saw dustMoldy cork dustEnzyme additivesSugarcane dust