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  3. 5th Class
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5th Class Science Sample Paper Science Olympiad Model Test Paper-9

  • question_answer
    Which of the following pollutant cannot be broken down into simpler substances by the action of microbes?

    A) Plastics             

    B) Tea leaves

    C) Plant leaves                  

    D) Cow dung

    E) None of these

    Correct Answer: A

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