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Question:

Water filled in two glasses A and B have BOD values of 10 and 20, respectively. The correct statement regarding them, is:

Ais more polluted than B

Ais suitable for drinking, whereas B is not

Both A and B are suitable for drinking

Bis more polluted than A

Solution:

The correct option is D. Bis more polluted than A.

Two glasses "A" and "B" have BOD values 10 and 20, respectively. Hence glass "B" is more polluted than glass "A".