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A radioactive sample of U^(238) decay to...

A radioactive sample of `U^(238)` decay to Pb through a process for which half-life is `4.5xx10^(9)` yrears . The ratio of number of nuclei of Pb to `U^(238)` after a time of `1.5xx10^(9)` Years `("given" 2^(1//3)=1.26)`

A

0.12

B

0.26

C

1.2

D

0.37

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