A) peat
B) anthracite
C) 1 ignite
D) bituminous coal
Correct Answer: B
Solution :
The different varieties of coal available are: Peat contains 60% carbon. Lignite contains 70% carbon. Bituminous contains 78% carbon. Semi bituminous contains 83% carbon. Anthracite contains 90% carbon. Anthracite has maximum percentage of carbon so, it is the purest form of coal.
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