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  1. Who discovered the insecticidal properties of DDT?

    2. A.

     Othmanzedicer
    B.

     R.H. Painter
    C.

     Paul Muller
    D.

     Rachel Carson

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    Answer : Option C

    Explanation :

    In 1939 the Swiss chemist Paul Müller discovered the insecticidal properties of DDT.

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