Which of the following statements is incorrect?

Given below are two statements:
Statement $I$: Chlorofluorocarbons breakdown by radiation in the visible energy region and release chlorine gas in the atmosphere which then reacts with stratospheric ozone.
Statement $II$: Atmospheric ozone reacts with nitric oxide to give nitrogen and oxygen gases,which add to the atmosphere.
For the above statements choose the correct answer from the options given below :

What is acid rain? Give the name of the gases responsible for the acid rain.

How is excessive content of $CO_2$ responsible for global warming?

The depletion of ozone in the stratosphere is caused by .......

Which of the following is not a greenhouse gas?