Question

Assertion (A): Presence of {Eichhornia} in a pond can lead to the death of fishes.
Reason (R): It is an invasive weed and occupies the total pond.
Identify the correct option from the following:

• A. Both (A) and (R) are true. (R) is correct explanation for (A)
• B. Both (A) and (R) are true. But (R) is not correct explanation for (A)
• C. (A) is true, but (R) is false
• D. (A) is false, but (R) is true

Hint:

Always focus on the direct cause-effect relationship between A and R while deciding on explanation.

Answer 1

The Correct Option is B

Step 1: Analyze Assertion (A)
{Eichhornia} causes oxygen depletion in ponds, leading to fish death — Assertion is true. Step 2: Analyze Reason (R)
{Eichhornia} is indeed invasive and can overgrow — Reason is also true. Step 3: Explanation relation
Although (R) is true, the root cause of fish death is oxygen depletion, not just space occupation — hence, not a correct explanation.