Which of the following types of coal is the best quality of coal?

Explanation:

Coal: Coal is a sedimentary, organic rock which is flammable.

• Coal is composed primarily of carbon along with other elements such as hydrogen, sulphur, oxygen, and nitrogen. Coal is mostly used for power generation and metallurgy. ​
• Higher quality coal produces less smoke, burns longer, and provides more energy than lower quality coal.

Major varieties of coal:

1. Anthracite- It is the best quality coal. It contains about 80 to 90 percent carbon. It is hard coal. In India, it is mainly found in the district of Reasi in the state of Jammu and Kashmir. 
2. Bituminous- It is the most widely available coal in India. It is of medium quality. It contains about 40 to 75 percent carbon. In India, much of the coal comes under this category.
3. Lignite- It is of low quality. It is brown in colour. It contains about 30 to 40 percent coal.
4. Peat- It is the middle stage in the process of coal formation. It contains less than 40 percent carbon. It has more impurities. The parts of the wood are remarkably present in it.