Given below are two statements, one is labelled asAssertion (A) :and the other as Reason (R).Assertion (A):The concept of Sustainable Development was popularised by the Brundtland Report.Reason (R):The Brundtland Report is also known as "The Limits to Growth".Select the correct answer from the codes given below:

1. A

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

   Option (a) claims both Assertion (A) and Reason (R) are true while (R) is not the correct explanation of (A). This option is incorrect because Reason (R) is factually false.

2. B

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

   Option (b) claims Assertion (A) is false and Reason (R) is true. This option is incorrect because the concept of Sustainable Development was indeed popularised by the Brundtland Report, making Assertion (A) true.

3. C

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

   Option (c) claims both Assertion (A) and Reason (R) are true and (R) is the correct explanation of (A). This is incorrect because the second statement contains an error regarding the alternative name of the report.

4. D

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

   Option (d) claims that Assertion (A) is true, but Reason (R) is false, which represents the exact factual position of both statements. Assertion (A) is correct as the Brundtland Commission officially defined and popularised sustainable development in its 1987 report Our Common Future. Reason (R) is incorrect because 'The Limits to Growth' was a 1972 report published by the Club of Rome, whereas the Brundtland Report is titled 'Our Common Future'.

Summary. Official key is (d) because the assertion regarding the Brundtland Report is correct while the reason misidentifies its title with another famous environmental publication. The Brundtland Report, formally known as Our Common Future, brought sustainable development into the global mainstream in 1987. In contrast, 'The Limits to Growth' was published earlier in 1972 by the Club of Rome. Students often confuse these landmark environmental milestones. Therefore, only option (d) accurately identifies the first statement as true and the second as false.