In which one of the following is higher percentage of carbon found ?

Coal is classified into four main ranks based on its carbon content and degree of coalification. Anthracite is the highest rank of coal, characterized by the highest carbon concentration, typically ranging from 80% to 97% [3]. It is a hard, glossy black coal that burns cleanly with a short blue flame and high heating value [4]. In contrast, Bituminous coal contains approximately 45% to 86% carbon [2], while Lignite (brown coal) and Peat represent lower ranks with significantly lower carbon levels and higher moisture [2]. Peat is the most inferior form, containing less than 40% carbon [2]. As coal is buried deeper and subjected to increased heat and pressure over millions of years, moisture and volatile matter are expelled, leading to a progressive increase in carbon percentage from peat to anthracite [1].

Sources

1. [1] https://www.eia.gov/energyexplained/coal/
2. [3] https://education.nationalgeographic.org/resource/coal/
3. [4] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 8: Energy Resources > Classification > p. 1
4. [2] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 8: Energy Resources > Classification > p. 2