AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(B) 4 : 2 : 1
Iron ore, coking coal and limestone are required in the ratio of approximately 4 : 2 : 1 for the manufacture of steel.
The passage directly states: "Iron ore, coking coal and lime stone are required in the ratio of approximately 4 : 2 : 1." This is a straightforward fact-based MCQ — just recall the correct order: iron ore is the highest (4), then coking coal (2), then limestone (1).