Chemistry - Environmental Chemistry Question with Solution | TestHub

The correct answer is C.

Explanation:

Chlorine radicals ($C{l}^{\circ }$) are primarily responsible for initiating the catalytic chain reaction that depletes ozone in the stratosphere. These radicals are formed from the photolysis of chlorofluorocarbons (CFCs) by UV radiation. The $C{l}^{\circ }$ radical then reacts with ozone ($O_3$) to start the depletion cycle.