A possible set of quantum numbers to describe an electron in a 4s subshell is A n=3,1=1, m, = 1, m = -1/2 B n=4,1=0,m, = 0,m = -1/2 n=4,1=1,m, = 1,m = +1/2 n=4,1=0,m, = 1,m = + 1/2