Which of the following statements about the use of radioactive isotopes is correct?

A.  In medicine, they are used as tracers for diagnostic purposes

B.  In industry, they are used to detect leak in water, oil and gas pipelines

C.  They are used to determine the age of rocks and fossils

D.  All of these statements are correct

Check Also

The filament of an electric bulb is made of :

A    Carbon B    Iron C    Tungsten D    None of these


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