Explanation:

The Office of the Economic Adviser, Department for Promotion of Industry and Internal Trade releases Index of Eight Core Industries. The combined Index of Eight Core Industries stood at 127.8 in February,2021, which declined by4.6 (provisional) per cent as compared to the Index of February, 2020.Its cumulative growth during April to February, 2020-21 has been(-) 8.3%.

1. Coal-Coal production (weight: 10.33per cent)
2. Crude Oil-Crude Oil production (weight: 8.98per cent)
3. Natural Gas- The Natural Gas production (weight:6.88per cent)
4. Petroleum Refinery Products- Petroleum Refinery production (weight:28.04per cent)
5. Fertilizers-Fertilizers production (weight:2.63 per cent)
6. Steel-Steel production (weight:17.92per cent)
7. Cement-Cement production (weight:5.37per cent) 
8. Electricity- Electricity generation (weight:19.85per cent)