A
It is utilized as a thermal binder during the cold rolling of galvanized steel sheets
B
It acts as a reducing agent in blast furnace steelmaking to convert iron ore into liquid iron
C
It serves as a corrosion-resistant coating applied to exterior structural beams
D
It functions as a structural flux to remove acidic impurities from stainless steel alloys
Correct answer: (b) It acts as a reducing agent in blast furnace steelmaking to convert iron ore into liquid iron
Explanation
Coking coal is an essential high-grade coal used as a reducing agent in blast furnaces to smelt iron ore into liquid iron. Options B, C, and D describe incorrect metallurgical functions.
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