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A radioactive sample S(1) having an acti...

A radioactive sample `S_(1)` having an activity of 5 `muCi` has twice the number of nuclei as another sample `S_(2)` which has an activity of 10 `muCi`. The half lives of `S_(1) and S_(2)` can be

A

20 years and 5 years, respectively

B

20 years and 10 years, respectively

C

10 years each

D

5 years each.

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The correct Answer is:
A
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