![Which one of the following groups represents secondary air pollutants?](https://www.gkseries.com/blog/wp-content/uploads/2021/12/Which-one-of-the-following-groups-represents-secondary-air-pollutants.png)
Q. Which one of the following groups represents secondary air pollutants?
- Ozone, Formaldehyde, Peroxy-acetyl-nitrate, and Halogen compounds
- Formaldehyde, Hydrocarbon, Ozone and Photochemical smog
- Ozone, Acid mist, Formaldehyde and Photochemical smog
- Formaldehyde, Acid mists, Hydrocarbon and Photochemical smog
Answer: Ozone, Acid mist, Formaldehyde and Photochemical smog