Which of these reactions is not a part of breakdown of ozone in stratosphere?

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

$\displaystyle \dot{\mathrm{Cl}}(\mathrm{~g})+\mathrm{O}_3(\mathrm{~g}) \longrightarrow \mathrm{Cl} \dot{\mathrm{O}}(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g})$

$\displaystyle \mathrm{Cl} \dot{\mathrm{O}}(\mathrm{~g})+\mathrm{O}(\mathrm{~g}) \longrightarrow \dot{\mathrm{Cl}}(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g})$

$\displaystyle 2 \mathrm{Cl} \dot{\mathrm{O}} \longrightarrow \mathrm{ClO}_2(\mathrm{~g})+\dot{\mathrm{Cl}}(\mathrm{~g})$