Civil Services OPSC OAS Mock Test Series 2025 General Knowledge Ecology and Environment Environmental pollution
Steel slag can be the material for which of the following?
1. Construction of base road
2. Improvement of agricultural soil
3. Production of cement
Select the correct answer using the code given below:
1
1 and 2 only
2
2 and 3 only
3
1 and 3 only
4
1, 2 and 3