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Discussion :: Lithosphere

  1. Which of the following forms of coal is the oldest?

    2. A.

     Peat
    B.

     Lignite
    C.

     Bituminous
    D.

     Anthracite

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    Answer : Option D

    Explanation :

    Anthracite is the highest ranked, hardest, oldest, and least common type of coal. It possesses a high energy content, high percentage of carbon (>85%) and relatively little moisture or volatiles.

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