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  1. The three abundant elements in the earth's crust are aluminium, oxygen and silicon. The correct order of their abundance is

    2. A.
    oxygen, aluminium, silicon
    B.
    aluminium, silicon, oxygen
    C.
    oxygen, silicon, aluminium
    D.
    silicon, oxygen, aluminium

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    Answer : Option C

    Explanation :

    Oxygen (46.60%) Silicon (27.72%) Aluminium (8.13%)

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