Q. Which among the following coal has highest carbon content ?
Answer: Anthracite
Notes: The correct answer is Anthracite. Anthracite coal has the highest carbon content, typically ranging from 86% to 97%. It is known for its high energy content and low impurities, making it the most efficient type of coal for heating. In contrast, lignite has the lowest carbon content (about 25% to 35%), while bituminous coal falls in between (about 45% to 86%). Torbanite, a less common type, is a type of oil shale and not classified as traditional coal.