Which of the following atmospheric pollutants is directly involved in the depletion of the ozone layer?

Given below are two statements.
Statement $I$: Absorption of $UV$ radiations is directly proportional to the thickness of ozone.
Statement $II$: Ozone is generated by absorption of shorter wavelength of infrared radiations.
In the light of the above two statements,choose the correct answer from the options given below.

Where is the ozone hole most prominent?

Why does the ozone hole form over Antarctica? How will enhanced ultraviolet radiations affect us?

Global agreement in specific control strategies to reduce the release of ozone depleting substances was adopted by

The ozone layer in the upper atmosphere is depleted by $.........$.