Presence of nitrates in water in excess of 50 ppm causes________________?
(A) Methemoglobinemia
(B) Gastroenteritis
(C) Asphyxiation
(D) Tooth decay
Presence of nitrates in water in excess of 50 ppm causes________________?
(A) Methemoglobinemia
(B) Gastroenteritis
(C) Asphyxiation
(D) Tooth decay
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