Question: Which of the following conditions in drinking water causes methemoglobinemia?
$>50$ ppm of load
$>100$ ppm of sulphate
$>50 \mathrm{ppm}$ of chloride
$>50$ ppm of nitrate
Correct Option: , 4
Solution:
Concentration of nitrate $>50 \mathrm{ppm}$ in drinking water causes methemoglobinemia
