In NCERT’s account of Indian mineral and energy resources, which coal is described as the most popular in commercial use?

Explanation

NCERT describes bituminous coal as the most popular coal in commercial use in its discussion of Indian mineral and energy resources. High-grade metallurgical bituminous coal is important for iron smelting. Anthracite is the highest-rank hard coal, which is a different distinction from the textbook commercial-use description.