Identify the correct statement-

Options

A. Quantum numbers (n,l,m,s) are obtained arbitrarily
B. all the quantum numbers (n,l,m,s) for any pair of electrons in an atom can be identical under special circumstance
C. All the quantum numbers (n,l,m,s) may not be required to describe an electron of an atom completely
D. all the quantum numbers (n,l,m,s) are required to describe an electron of an atom completely.

Answer

D