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  1. The radio-isotope used to detect blood-clots in the circulatory system is
    1. Arsenic-74
    2. Cobalt-60
    3. I-131
    4. Sodium-24
Correct Option: D

No-24 is used as a radionuclide which is injected into the human bloodstream to detect any clots. The half-life of Na-24 is 15.6 hrs.


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