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Two radiactive sources A and B initially...

Two radiactive sources `A` and `B` initially contain equal number of radioactive atoms. Source `A` has half-life of `1` hour and source `B` has a half-life `2` hours. At the end of `2` hours, the ratio of the rate of disintergration of `A` to that of `B` is :

A

`1:1`

B

`1:2`

C

`2:1`

D

`1:3`

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A
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