Answer :
Answer: The correct option is B.
Explanation: As the electron moves from lower energy level to higher energy level, it absorbs some amount of energy. When the electron returns back from this higher energy level to the lower energy level, it emits the exact amount of energy it has absorbed.
As every orbital has its characteristic energy value, whenever electrons absorb or emit energy, they move to different energy level that is they occupy different orbitals and hence we can say that the electron moves between orbital levels.