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  3. 9th Class
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9th Class Science Sample Paper Science Olympiad Model Test Paper-16

  • question_answer
    Which one of the following types of cells is in human heart that contract rapidly, rhythmically and tirelessly?

    A) Mucous cells

    B) Zymogen cells

    C) Cardiac cells

    D) Parietal cells

    E) None of these

    Correct Answer: C

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