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  3. 9th Class
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9th Class Science Sample Paper Science Olympiad Model Test Paper-8

  • question_answer
    Which one of the following radioactive isotopes is used to detect the presence of blood clots?

    A) Arsenic - 74

    B) Cobalt - 60

    C) Iodine - 131

    D) Sodium - 24

    E) None of these

    Correct Answer: D

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