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The decay constant of a radioactive elem...

The decay constant of a radioactive element is` 3 xx 10^(-6) min^-`.Its half life is

A

`2.31 xx 10^5 min`

B

`2.31 xx 10^6 min`

C

`2.31xx10^(-6) min`

D

`2.31 xx10^(-7) min`

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