Assertion(A): Polluted water may have a value of BOD of the order of 17 ppm.
Reason (R): BOD is a measure of oxygen required to oxidise both the biodegradable and nonbiodegradable organic material in water.
In the light of the above statements, choose the most appropriate answer

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Both A and R are correct and R is the correct explanation of A.

Both A and R are correct but R is NOT the correct explanation of A.

A is correct but R is not correct.

A is not correct but R is correct.

answer is C.

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Detailed Solution

Clean water have BOD less than 5 ppm while highly polluted water has BOD greater or equal to
17 ppm. So, assertion is correct. BOD is measure of oxygen required to oxidise only bio-degradable organic matter. So, reason is false.

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