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  1. The maximum permissible nitrites in public water supplies, is

    2. A.
    Nil
    B.
    0.5 P.P.M.
    C.
    1.0. P.P.M.
    D.
    1.5 P.P.M.
    E.
    200 P.P.M.

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    Answer : Option A

    Explanation :

    No answer description available for this question. Let us discuss.

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