A) strontium - 30
B) cobalt - 60
C) cesium-137
D) none of these.
Correct Answer: D
Solution :
: The radioactive dust that falls to the earth after atomic explosion is called radioactive fallout. All nuclear explosions release 5% radioactive strontium-90 which cause pollution of air, water and soil. It replaces calcium in plants and animals. Sr-90 causes bone cancer and tissue degeneration in most animals and man.
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