In the given reaction $_Z{X^A} \to _{Z+1}{Y^A} \to _{Z-1}{K^{A-4}} \to _{Z-1}{K^{A-4}}$,radioactive radiations are emitted in the sequence:

  • A
    $\alpha, \beta, \gamma$
  • B
    $\beta, \alpha, \gamma$
  • C
    $\gamma, \alpha, \beta$
  • D
    $\beta, \gamma, \alpha$

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