Civil Services Kerala (കേരളം) PSC KAS Prelims Test Series 2025 General Knowledge Ecology and Environment Environmental pollution
Photochemical smog is caused due to reaction of which among the following with sunlight?
1. Carbon dioxide
2. Oxides of Nitrogen
3. Oxides of Sulphur
4. Methane
Select the correct answer using the code given below.
1
1 and 2 only
2
2 only
3
2 and 3 only
4
2, 3, and 4 only