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For nuclide ""(Z)X""^(A), which of the f...

For nuclide `""_(Z)X""^(A)`, which of the following changes snot take place in respective decay: a)Both (A) and (Z) decreases in `alpha`-decay b)Both (A) and (Z) do not change in `gamma`-decay c)(A) does not change but (Z) decreases by one unitun positrondecay or k-electron capture d)Both (A) and (Z) increases in `beta`-decay

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`""^(99)As` and `""^(158)Nd`
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