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प्रश्न
Which of the following conditions in drinking water causes methemoglobinemia?
विकल्प
> 50 ppm of lead
> 50 ppm of chloride
> 50 ppm of nitrate
> 100 ppm of sulphate
MCQ
उत्तर
> 50 ppm of nitrate
Explanation:
Nitrate contaminated drinking water is the main cause of methemoglobinemia.
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Water Pollution and Its Causes - International Standards for Drinking Water
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