Which of the following condition in drinking water cause methemoglobinemia ?

> 50 ppm of nitrate

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> 50 ppm of chloride

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> 100 ppm of sulphate

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> 50ppm of lead

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Solution

The correct option is A > 50 ppm 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.

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