Solution:
The Office of Economic Adviser, Department for Promotion of Industry and Internal Trade releases the 'Index of Eight Core Industries' (ICI) for every month with base 2011-12- 100. ICI measures combined and individual performance of production in selected Eight Core Industries. The Eight Core Industries comprise 40.27 percent of the weight of items included in the Index of Industrial Production (IIP). The weights (in %) of Eight Core Industries in ICI in descending order are as follows: 1. Refinery Products (28.0376), 2. Electricity (19,8530), 3. Steel (17.9166), 4. Coal (10.3335), 5. Crude Oil (8.9833), 6. Natural Gas (6.8768), 7. Cement (5.3720), 8. Fertilizers (2.6276).
Hence, in the ICI, highest weight is given to refinery products, but among the given options the highest weight is given to electricity generation.