In India, the steel production industry requires the import of

1. The steel production industry in India, particularly the integrated steel plants using the blast furnace route, depends heavily on certain key raw materials. 2. Coking coal is an essential input for the blast furnace process, where it serves as both a fuel and a reducing agent to convert iron ore into pig iron. 3. India has large reserves of non-coking coal (thermal coal) but has limited reserves of high-quality coking coal. 4. Consequently, the Indian steel industry requires significant imports of coking coal to meet its demand. Hence, option (C) is correct. 5. Option (A) Saltpetre (potassium nitrate) is primarily used in fertilizers, explosives, and food preservation, not in primary steel production. 6. Option (B) Rock phosphate is the main source of phosphorus for fertilizers and is not a required import for the steel industry. 7. Since only coking coal is a required import among the options for the steel industry, option (D) is incorrect.