Which of the following conditions in drinking water causes methemoglobinemia?
(1) > 50ppm of lead
(2) > 100 ppm of sulphate
(3) > 50 ppm of chloride
(4) > 50 ppm of nitrate
The correct option (4) > 50 ppm of nitrate
Explanation:
Drinking water containing > 50 ppm of nitrate causes methemoglobinemia.
