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The reaction thst is NOT involve in the ozone layer depletion mechanism in the stratosohere is:
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Breakdown of ozone -
CFCs in stratosphere absorbs UV radiations and form chlorine free radical, which continuously breakdown the ozone.
- wherein
As we have learned in ozone layer depletion .
Ozone layer is depleted due to various pollutants and the reaction which is not involved is -
Option 1)

Option 3)
Option 4)