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A radioactive nuclie decay as follows A ...

A radioactive nuclie decay as follows `A overset(alpha)to A_(1)overset(beta) to A_(2) overset(alpha)to A_(3) overset(gamma)to A_(4)`. If mass number and atomic number of A are 180 and 72 respectively then mass number and atomic number for `A_4` will be

A

171 and 69

B

174 and 70

C

176 and 69

D

176 and 70

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The correct Answer is:
A
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