Identify the nuclear reaction that differs from the rest

Options

A. Positron emission
B. K– capture
C. `beta`-decay
D. `gamma`-decay

Answer

D

Explanation

`beta`–emission occurs in those radioactive elements in which n/p ratio is higher than required for stability. In `beta`–emission n/p ratio decreases, where as α emission, positron emission and K–capture occurs in those elements in which n/p ratio is lower than required for stability. Alpha emission is usually observed in natural radioactive isotope while emission of positron or K– capture is observed in artificial radioactive isotope.
There is no change in n/p ratio due of `gamma` –emission.