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Q.

______ comes in several varieties, including anthracite, bituminous, lignite, and peat.


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a

Iron

b

Coal

c

Gold

d

Copper 

answer is B.

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Detailed Solution

Coal is a kind of carbonate sedimentary rock. Coal is used to generate electricity. Coal is categorised into four types based on the amount of iron it contains: peat, lignite, bituminous, and anthracite. Coal formation takes a very long period. Peat is the initial step of its creation. Because of its limited heating capability, peat is often utilised as a residential fuel. The second step is lignite, which has a carbon concentration of less than 50%.
 
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