In the given reaction ${ }_z X^A \rightarrow{ }_{z+1} Y^A \rightarrow{ }_{z-1} K^{A-4} \rightarrow{ }_{z-1} K^{A-4}$ radioactive radiations are emitted in the sequence

• A

  $\alpha, \beta, \gamma$
• Correct answer
  B

  $\beta, \alpha, \gamma$
• C

  $\gamma, \alpha, \beta$
• D

  $\beta, \gamma, \alpha$

Solution

$\therefore \quad$ The sequence is $\beta, \alpha$ and $\gamma$.

Hence, the correct answer is option: 'B'.