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Q.

Clean water has BOD value :

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a

<7ppm

b

< 5 ppm

c

<17ppm

d

< 6 ppm

answer is A.

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Detailed Solution

A BOD value of more than 100 ppm suggests that water is highly polluted. The clean water should have a BOD value of less than 5 ppm.

Hence, the correct option is A.

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