Question

Assertion (A): Indices of water pollution are lichens.

Reason (R): Lichens growth is greatly inhibited by the water pollutants.

पर्याय

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

• Both A and R are true but R is not the correct explanation of A.

• A is true but R is false.

• A is false but R is true.

Answer 1

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

Explanation:

Sewage-contaminated water can contain bacteria, viruses, fungi, and parasites. Therefore, Assertion (A) is true.

Such contaminated water can cause diseases such as cholera, typhoid, and jaundice. Therefore, Reason (R) is true.

However, R does not explain A. It states the diseases caused by contaminated water, rather than explaining why the water contains those microorganisms.

Hence, both A and R are true but R is not the correct explanation of A.