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If the half lives of a radioactive eleme...

If the half lives of a radioactive element for `alpha` and `beta` decay are 4 year and 12 years respectively, then the percentage of the element that remains after 12 year will be

A

`6.25 %`

B

`5.25 %`

C

`4.25%`

D

`3.50%`

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The correct Answer is:
A
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