Assertion: Photochemical smog is oxidising in nature.
Reason: Photochemical smog contains `NO_(2)` and `O_(3)` which are formed during the sequence of reactions.
A. Both A and R are correct and R is the correct explanation of A.
B. Both A and R are correct but R is not the correct explanation of A.
C. Both A and R are not correct.
D. A is not correct but R is correct.
