Which of the following conditions in drinking water causes methemoglobinemia?
A
>50ppm of load
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B
>100ppm of sulphate
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C
>50ppm of chloride
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D
>50ppm of nitrate
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Solution
The correct option is C>50ppm of nitrate The concentration of nitrate >50ppm in drinking water causes methemoglobinemia which is a blood disorder in which an abnormal amount of methemoglobin is produced.