Which of the following types of coal is known to have the highest carbon content in it?

Anthracite is the highest grade of coal with the highest carbon content, exceeding 86%. It is the most metamorphosed form of coal, containing minimal moisture and volatile matter, making it a hard, dense coal. It has the highest calorific value, around 35 megajoules per kilogram, and is rare, comprising less than 2% of the coal reserves in the U.S. and is mostly found in northeastern Pennsylvania.