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  1. Hardest allotrope of carbon is

    2. A.

     Diamond
    B.

     Graphite
    C.

     Coke
    D.

     Lamp black

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    Answer : Option A

    Explanation :

    Diamond is a well known allotrope of carbon. The hardness and high dispersion of light of diamond make it useful for both industrial applications and jewelry. Diamond is the hardest known natural mineral.

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