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The number of alpha and beta particles e...

The number of `alpha` and `beta` particles emitted in the nuclear reaction, `._(90)Th^(298) rarr ._(83)Bi^(212)` are

A

`4 alpha` and `7 beta`

B

`4 alpha` and `1 beta`

C

`8 alpha` and `1//beta`

D

`3 alpha` and `7 beta`

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The correct Answer is:
B
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