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A nuclide of " "(90)^(232)Th decays succ...

A nuclide of `" "_(90)^(232)Th` decays successively in a number of steps and finally we get `" "_(82)^(208)Pb`. The number of alpha and beta particles emitted in the process are

A

`alpha=3, beta=3`

B

`alpha=6,beta=4`

C

`alpha=6, beta=0`

D

`alpha=4,beta=6`

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The correct Answer is:
B
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