4. Consider the following statements regarding photochemical | UPSCPrep.com

4. Consider the following statements regarding photochemical smog
1. Cool, dry weather and temperature inversion are the ideal conditions for photochemical smog to occur.
2. It is the chemical reaction of sunlight, sulphur oxides and volatile organic compounds in the atmosphere.
3. Cities that are surrounded by mountains or that lie in the basins are more prone to this type of smog.