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(D) The presence of $CFCs$ (chlorofluorocarbons) in the atmosphere is the primary cause of ozone layer depletion in the stratosphere. $CFCs$ are relea

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$CFCs$

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(D) The presence of $CFCs$ (chlorofluorocarbons) in the atmosphere is the primary cause of ozone layer depletion in the stratosphere. $CFCs$ are released from refrigerators,air conditioners,and aerosol sprays. In the stratosphere,$CFCs$ break down under $UV$ radiation to release chlorine radicals $(Cl^{\bullet})$,which catalyze the decomposition of ozone $(O_3)$ into oxygen $(O_2)$. This depletion leads to the formation of an 'ozone hole',allowing harmful $UV$ radiation to reach the Earth's surface.

List-$I$	List-$II$
$a$. Biochemical oxygen demand	$i$. Oxidising mixture
$b$. Photochemical smog	$ii$. Stratospheric cloud
$c$. Classical smog	$iii$. Organic matter in water
$d$. Ozone layer depletion	$iv$. Reducing mixture

Ozone depletion in the stratosphere is mainly caused by

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