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  3. A trace element, in the form of radio active isotope, which is useful in cancer therapy is

. A trace element, in the form of radio active isotope, which is useful in cancer therapy is

A. sodium                    B. cobalt                      C. calcium                   D. iron

 

Best Answer

(b)

A trace element, also in the form of radioactive isotope useful in cancer therapy is cobalt.

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