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5th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • question_answer
    Waves which range from 20 hz to 20,000 hz:

    A) cannot be heard by human beings.

    B) is the hearing range for human beings.

    C) is the hearing range of bat.

    D) is the hearing range of dolphins.

    E) None of these

    Correct Answer: B

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