Arrange the electrons represented by the following sets of quantum numbers in the decreasing order of energy?

Options

A. a) n=4 l=0 m=0 s=+1/2
B. b) n=3 l=1 m=1 s=-1/2
C. c) n=3 l=2 m=0 s=+1/2
D. d) n=3l=0 m=0 s=-1/2