What is the result of the action of ultraviolet $(UV)$ rays on molecular oxygen $(O_2)$?

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers?

Recognizing the deleterious effects of ozone depletion,an international treaty known as . . . . . . was signed at . . . . . . .

Why is an ozone hole formed over Antarctica?

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.