UGC NET Questions (Paper – 1)

Statements D and F are wrong because ozone depletion does affect terrestrial plants, phytoplankton and food webs, and the ozone layer has not yet fully recovered, requiring ongoing compliance with treaties. A, B, C and E are correct: the ozone layer filters UV-B, excess exposure increases health risks, the Montreal Protocol guides phase-out of harmful substances and protective behaviours reduce risk. Therefore, the correct answer is the combination that identifies D and F as the wrong statements.

Option A:
Option A is correct since it pinpoints both D and F as misrepresenting scientific and policy realities, while accepting A, B, C and E, which align with current understanding of ozone protection and UV impacts. It reflects both ecological and human health dimensions.

Option B:
Option B is incorrect because it singles out only D and ignores F, even though claiming treaties are no longer needed is clearly inconsistent with ongoing monitoring and gradual recovery timelines.

Option C:
Option C is incorrect as it marks only F as wrong and overlooks D, which denies the ecological consequences of ozone depletion. By failing to include D, it neglects an important environmental dimension of the issue.

Option D:
Option D is incorrect because it adds C to the list of wrong statements, even though C correctly notes that the Montreal Protocol has been central in guiding the replacement of ozone-depleting substances. Including C among wrong statements contradicts widely accepted historical facts.