A) Cotton mills
B) Nuclear reactors
C) Petroleum refineries
D) Thermal power plants
Correct Answer: A
Solution :
[a] The cotton dust which is less than 2 mm in size, is \[176\,\,mg/100\,\,{{m}^{3}}\] in fine mills and concentration is above \[150\,\,mg/100\,\,{{m}^{3}}\] produces pneumoconiosis or lung fibrosis called byssinosis.
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