The reaction that is NOT involved in the ozone layer depletion mechanism in the stratosphere is:

$\displaystyle \mathrm{HOCl}(\mathrm{~g}) \xrightarrow{\mathrm{h} v} \dot{\mathrm{O}} \mathrm{H}(\mathrm{~g})+\dot{\mathrm{C}} \mathrm{l}(\mathrm{~g})$

$\displaystyle \mathrm{Cl} \dot{\mathrm{O}}(\mathrm{~g})+\mathrm{O}(\mathrm{~g}) \rightarrow \dot{\mathrm{C}} \mathrm{l}(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g})$

$\displaystyle \mathrm{CH}_4+2 \mathrm{O}_3 \rightarrow 3 \mathrm{CH}_2=\mathrm{O}+3 \mathrm{H}_2 \mathrm{O}$

$\displaystyle \mathrm{CF}_2 \mathrm{Cl}_2(\mathrm{~g}) \xrightarrow{\mathrm{uv}} \dot{\mathrm{C}} \mathrm{l}(\mathrm{~g})+\dot{\mathrm{C}} \mathrm{~F}_2 \mathrm{Cl}(\mathrm{~g})$