1. Coking coal should be reserved only for metallurgical industry. |
2. Low grade coal should be washed to remove impurities. |
3. Selective mining should be stopped |
4. The non-conventional sources of energy should be popularised |
A) 1, 2 and 3 are correct
B) 1, 2 and 4 are correct
C) 1, 3 and 4 are correct
D) 1, 2, 3 and 4 are correct
Correct Answer: D
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