Observe the following statements:
Statement-$I$: The carbon-containing components of photochemical smog are acrolein,methanal,and $PAN$.
Statement-$II$: The number of greenhouse gases in the list given below is $5$: $CH_4, CO_2, NO, H_2O_{(l)}, H_2O_{(g)}, O_2, O_3$.
The correct answer is:

• A
  Both statements $I$ and $II$ are correct
• B
  Both statements $I$ and $II$ are not correct
• C
  Statement $I$ is correct,but statement $II$ is not correct
• D
  Statement $I$ is not correct,but statement $II$ is correct