Given That N = 2 for an Electron Configuration, the Following

Multiple Choice

Given that n = 2 for an electron configuration, the following stationary state is not permitted:

A) n = 2, $l$ = 2, m = 1.
B) n = 2, $l$ = 1, m = 0.
C) n = 2, $l$ = 1, m = 1.
D) Hold on. All of the above states are permitted.