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  3. 4th Class
  4. Science

4th Class Science Sample Paper Science Olympiad Model Test Paper-19

  • question_answer
    Which of the following is the natural cause of acid rain?

    A) Volcanic eruption

    B) Smoke emitted from factories

    C) Smoke emitted from vehicles

    D) Tsunami waves

    E) All of these

    Correct Answer: A

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