The correct set of species responsible for the photochemical smog is:

Step-by-step solution

Smog is derived from smoke + fog, this is most common example of air pollution, photochemical smog occurs in warm, dry and sunny climate also known as oxidizing smog. Unburnt hydrocarbons + Nitric oxide N O 2 g → h ν N O g + O g O 2 g + O g → O 3 g C H 4 + 2 O 3 → 3 C H 2 O Formaldehyde + 3 H 2 O So the common component of photochemical smog are Ozone, No, acrolein, PAN, formaldehyde.