Give the set of four quantum numbers that could represent the last electron added using the aufbau principles to the Br atom.

a) n=5, l=1, m=0, s=-1/2
b) n=4, l=2, m=1, s=1/2
c) n=6, l=0, m=0, s=-1/2
d) n=3, l=3, m=-2, s=1/2