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  1. Cement mainly contains

    2. A.
    CaO, SiO2, Al2O3
    B.
    MgO, SiO2, K2O
    C.
    Al2O3, MgO, Fe2O3
    D.
    CaO, MgO, K2O

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    Answer : Option A

    Explanation :

    No answer description available for this question.

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