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  1. Percentage of lead in lead pencils is

    2. A.

     0
    B.

     31-66
    C.

     40
    D.

     80

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    Answer : Option A

    Explanation :

    There is no percentage of lead in lead pencils, or we can say zero percentage of lead. The pencils are nowadays made of graphite, which is an allotrope of carbon.

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