Consider the following sets of quantum number

	n	1	m	s
(i)	3	0	0	$+\frac{1}{2}$
(ii)	2	2	1	$+\frac{1}{2}$
(iii)	4	3	$-2$	$-\frac{1}{2}$
(iv)	1	0	$-1$	$-\frac{1}{2}$
(v)	3	2	3	$+\frac{1}{2}$

Which of the following sets of quauntum numbers is not possible?

$l=n-1$

this means that value of l is less than n, hence value of l given in (ii) is wrong. m values ranges from -1 to +1, so the m value given in (iv) is not possible. Similarlty, in (v), the value of m is not possible.

(ii), (iv) and (v)