question_answer

\[X\xrightarrow{-\alpha }Y\xrightarrow{-\beta }Z\xrightarrow{-\beta }W\]                 In the above sequence of reaction, the elements which are isotopes of each other are  [JIPMER 1997]

A)                 \[X\] and \[W\]                

B)                 \[Y\] and \[Z\]

C)                 \[X\] and \[Z\]  

D)                 None of these