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The rate of disintegration is 10^17 at o...

The rate of disintegration is `10^17 at oms//second` and half-life is 1445 years. Then no. of atoms is

A

`1.44 xx 10^17`

B

`1.4 xx 10^17`

C

`6.57 xx 10^27`

D

none of these.

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