A) Black lung disease (pneumoconiosis) found mainly in workers in stone quarries and crushers.
B) Blue baby disease (methaemoglobinaemia) due to heavy use of nitrogenous fertilisers in the area.
C) Non-hodgkin's lymphoma found mainly in workers involved in manufacture of neem based pesticides.
D) Skin cancer mainly in people exposed to benzene and methane.
Correct Answer: B
Solution :
Blue baby syndrome is a pathological condition, called methaemoglobinaemia, in which blood's capacity for oxygen transport is reduced, resulting in bluish skin discoloration in infants. Blue baby syndrome begins when large amount of nitrates in water are ingested by an infant and converted to nitrite by the digestive system. The nitrite then reacts with oxyhaemoglobin (the oxygen-carrying blood protein) to form methaemoglobin, which cannot carry oxygen.
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