Supposing the electron is present in the `4^(th)` energy level of H- atom. When the electron returns to ground state the possible transitions would be :

Options

A. `4 to 1 `
B. `4 to 2 , 2 to 1 `
C. `4 to 3 , 3 to 2 , 2 to 1 `
D. All the above

Answer

D

Explanation

All de-excitations possible from `4^(th)` orbit.