n, l, m, * values of differentiating electron of A and B are given below
A : n = 4, l = 0, m = 0, * = + 1/2
B : n = 3, l = 2, m = - 2, * = + 1/2
A and B belongs to
(a) A (I A group and 3rd **), B (II A group and 4th **)
(b) A ( I A group and 4th **), B ( III B group and 4th **)
(c) A ( II A group and 3rd **), B ( III B group and 4th **)
(d) A III A group and 4th **), B (II B group and 5th **)
