Correct Answer: Anthracite

Solution : The correct answer is Anthracite.

• Anthracite contains the most carbon of any coal, ranging from 86% to 97%. It is also known as hard coal, and it has a lot of energy.
• Bitumen contains 45% to 86% carbon. It is a type of coal widely used in power generation and industry.
• Peat has a low carbon concentration, often about 50% or less. It is not regarded as real coal because it is still in the early stages of coal production.
• Lignite contains between 25% and 35% carbon. It is also known as brown coal and has a lower energy content than the other types.