Given below are two statements, one is labelled asAssertion (A) :and the other as Reason (R).Assertion (A):Sustainable development is important for the well-being of human society.Reason (R):Sustainable development is a kind of development that meets the needs of the present without compromising the ability of future generations to meet their own needs.Select the correct answer from the codes given below:

1. A

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

   Both (A) and (R) are true and (R) correctly explains (A). Sustainable development, as defined by the Brundtland Commission, meets present needs without compromising future generations — which is why it matters for the well-being of human society. That is the official key.

2. B

   Both (A) and (R) are true hut (R) is not the correct explanation of (A)

   Both are true, but the paper treats the Brundtland definition as the explanation of why SD matters, not as an unrelated true fact.

3. C

   (A) is true, but (R) is false

   (R) is not false; it is the standard definition.

4. D

   (A) is false, but (R) is true

   (A) is not false.

Summary. Official key is (a). (R) is the Brundtland definition and explains why sustainable development is important for social well-being.