state gov Kerala PSC Degree (Common Preliminary Examination) Mock Test Series 2025 General Knowledge Ecology and Environment Environmental pollution
Which of the following are some important pollutants released by the steel industry in India?
1. Oxides of sulphur
2. Oxides of nitrogen
3. Carbon monoxide
4. Carbon dioxide
Select the correct answer using the code given below.
1
1, 3 and 4 only
2
2 and 3 only
3
1 and 4 only
4
1, 2, 3 and 4