Which one of the following is not coal variety? A. Lignite B. Bituminous C. Dolomite D. Peat

The correct answer is C. Dolomite.

Lignite, bituminous, and peat are all coal varieties. Lignite is the lowest grade of coal, and it is brown in color. Bituminous coal is a higher grade of coal, and it is black in color. Peat is a type of coal that is formed from plant material that has been buried and

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