Q. Which of the following industries is/are part of eight core industries?
1. Coal
2. Crude oil
3. Refinery products
4. Textiles
Select the correct answer using the code given below: 
Answer: C
Notes:
The Index of Eight Core Industries measures the performance of eight core industries i.e., Coal, Crude Oil, Natural Gas, Refinery Products, Fertilizers, Steel, Cement and Electricity. The industries included in the Index of Eight Core Industries comprise 40.27 per cent weight in the Index of Industrial Production (IIP).
Source: Economic Survey
