Kerala KAS 2020 · Question 48 of 70

Assertion (A): Biosphere constitutes an excellent life-support system which is sustainable and can fulfil all human needs. Reason (R): The size and productivity of the biosphere is limited by availability of water, nutrients and environmental conditions.

Environment

ABoth (A) and (R) are true and (R) is the correct explanation of (A)
BBoth (A) and (R) are true, but (R) is not the correct explanation of (A)
C(A) is true, but (R) is false
D(A) is false, but (R) is trueCorrect

Answer: D. (A) is false, but (R) is true

Explanation

The assertion overstates sustainability - the biosphere cannot fulfil all human needs indefinitely; the reason correctly states its limits. So (A) is false and (R) is true.

Source: Kerala PSC KAS Officer 016/2020 official paper (22-Feb-2020), provisional answer key

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