Assertion :Presently the global atmosphere is warming up. Reason: The depletion of stratospheric ozone layer has resulted in increase in ultraviolet radiations reaching earth.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The global atmosphere is warming up due to the build-up of the greenhouse gases in the troposphere like carbon dioxide, methane, water vapours, oxides of nitrogen etc. due to the anthropogenic activities.
The depletion of the stratospheric ozone layer exposes the earth's surface to the harmful UV radiations. This depletion is caused by ozone-depleting substances like CFCs, HFCs, methyl bromide etc. Ozone depletion does not increase the temperature of the atmosphere.
Hence, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'

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