Which type of Coal is the best quality of Coal?

Anthracite is the best quality of coal because it has the least ash content as compared to others.

Anthracite is very hard, compact variety of mineral coal that has a high luster.

It has the highest carbon count and it contains the fewest impurities of all coals, and has the highest calorific content as compared to other types of coals such as bituminous coal and lignite.

The correct option is C: Anthracite