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Consider the following statements about ...

Consider the following statements about different impurities in drinking water
I. Lead can damage kidney, liver, reproductive system
II. Sulphide content above 500 ppm causes laxative effect.
III. Nitrate content above 50 ppm causes disease such as methemoglobinemia. Out of these

A

Only III correct

B

I & II are correct

C

II & III are correct

D

All the above

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