Depletion of stratospheric ozone results in which of the following? Choose the correct answer from the options given below.

1.Increase in the ultraviolet radiation

2.Increase in infra-red radiation

3.Increase in skin cancer

4.Significant impact on terrestrial flora and fauna

5.Decrease in cataract cases

A1, 2, 3 and 4 only

B1, 3 and 4 only ✓ Correct

C2, 3, 4 and 5 only

D1, 2 and 3 only

Correct answer: (B) 1, 3 and 4 only

Explanation

Stratospheric ozone loss raises ultraviolet radiation, skin cancer and harm to land plants and animals.

Statement 1, more ultraviolet radiation, is correct as ozone normally shields against it.

Statement 3, more skin cancer, follows from greater ultraviolet exposure.

Statement 4, impact on terrestrial flora and fauna, is a real ecological consequence.

Statement 2, more infra-red radiation, is wrong since ozone loss does not raise infra-red this way.

Statement 5, fewer cataracts, is wrong because eye damage and cataracts actually increase.

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