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  3. 6th Class
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6th Class Science Sample Paper Science Olympiad Model Test Paper-6

  • question_answer
    Burning of fossil fuels causes air pollution. Which one of the following fuels can be replaced by CNG?

    A) Petrol

    B) Diesel

    C) Uranium

    D) Both A and B

    E) None of these

    Correct Answer: D

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