Answer:
gamma Ray
Step-by-step explanation:
Stable or unstable nucleus will have high energy in form of nuclear energy stored in it.
When this energy exist in the unstable state of the nucleus then in order to attain the stability the nucleus will will go to lower energy state.
This energy change is of higher order due to which energy released is of large order and high frequency electromagnetic waves.
so it is given as
since this energy is of higher range so it is given as gamma rays.
so correct answer will be
Gamma Rays