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The half-life of ""^(198) Au is 3 days....

The half-life of `""^(198)` Au is 3 days. If atomic weight of `""^(198)` Au is 198 g/mol then the activity of 2 mg of `""^(198")` Au is [in disintegration/second] :

A

`2.67xx10^(12)`

B

`6.06xx10^(18)`

C

`32.36xx10^(12)`

D

`16.18xx10^(12)`

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