Q. Photochemical smog always contains
A) $O_{3}$
B) $CO$
C) $CO_{2}$
D) $CH_{4}$
Explanation
The correct answer is Option A: $O_{3}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.