Correct Answer: Option C — Coal. Coal is correctly identified as Jharia, Raniganj and Bokaro are well-known coalfields. Coal is also associated with it is widely used in thermal power generation and metallurgical industries. Another identifying fact about Coal is that Jharia, Raniganj and Bokaro are well-known coalfields. A further exam-relevant fact about Coal is that it is widely used in thermal power generation and metallurgical industries. Why the other options are incorrect: • Option A — Petroleum: Petroleum is crude oil is processed in refineries into fuels and petrochemical feedstocks. It is incorrect here because Petroleum is instead associated with anticlines, faults and porous reservoir rocks can form hydrocarbon traps. • Option B — Natural Gas: Natural Gas is the Krishna-Godavari basin and western offshore region are important associations. It is incorrect here because Natural Gas is instead associated with it is used for power, fertilizer manufacture, industry and household fuel. • Option D — Iron Ore: Iron Ore is important belts occur in Odisha-Jharkhand, Durg-Bastar-Chandrapur and Karnataka-Goa regions. It is incorrect here because Iron Ore is instead associated with beneficiation may improve ore quality before metallurgical use. Exam Takeaway: Connect Coal with “Jharia, Raniganj and Bokaro are well-known coalfields” and “it is widely used in thermal power generation and metallurgical industries” for revision.