Consider the following set of quantum numbers.

	n	1	m$_1$
A.	3	3	$-$3
B.	3	2	$-$2
C.	2	1	+1
D.	2	2	+2

The number of correct sets of quantum numbers is __________.

<p><b>For A</b>,</p> <p>Given n = 3 and l = 3</p> <p>but we know maximum value of l = n $-$ 1.</p> <p>$\therefore$ l can't be equal to n.</p> <p>So, Set A of quantum numbers is not possible.</p> <p><b>For B</b>,</p> <p>Given n = 3, l = 2, m = $-$ 2</p> <p>Here, l = 2 which follow the rule l = n $-$ 1.</p> <p>And we know possible value of m is $-$ l to + l.</p> <p>here possible value of m = $-$2 to +2</p> <p>$\therefore$ This Set B is valid set of quantum numbers.</p> <p><b>For C</b>,</p> <p>Given n = 2, l = 1, m = +1</p> <p>Here l = 1 which follows the rule l = n $-$ 1.</p> <p>For l = 1 possible value of m = $-$1 to +1</p> <p>Here m = +1. So value of m is valid.</p> <p>$\therefore$ Set C is valid set of quantum numbers.</p> <p><b>For D</b>,</p> <p>Given n = 2, l = 2, m = +2</p> <p>l = 2 does not follow the rule l = n $-$ 1 rule.</p> <p>$\therefore$ Set D is not valid set of quantum numbers.</p>