The quantum number which explain the line spectra observed as doublets in case of hydrogen and alkali metals and doublets & triplets in case of alkaline earth metals is

The quantum number which explain the line spectra observed as doublets

1.	The quantum number which explain the line spectra observed as doublets in case of hydrogen and alkali metals and doublets & triplets in case of alkaline earth metals is
Answer» Spin Azimuthal Magnetic Principle Answer :A