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The half-fife of ^215At is 100 mus. The ...

The half-fife of `^215At` is `100 mus`. The time taken for the radioactivity of sample of `^215At` to decay to `1/16th` of its initial value is

A

`100 mus`

B

`200 mus`

C

`300 mus`

D

`400 mus`.

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