Assertion (A): If BOD level of water in a reservoir is less
Question:

Assertion (A): If BOD level of water in a reservoir is less than 5 ppm it is

highly polluted.

Reason (R): High biological oxygen demand means a low activity of bacteria

in water.

(i) Both A and R are correct and R is the correct explanation of A.

(ii) Both A and R are correct but R is not the correct explanation of A.

(iii) Both A and R are not correct.

(iv) A is not correct but R is correct.

Solution:

Option (iii) is the answer.

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