Consider the following pair of electrons :
1. \(n=3, l=1, m_l =1, m_s = + \frac{1}{2}\; and \;n = 3, l=2, m_l =1, m_s=+\frac{1}{2}\)
2. \(n=3,l=2,m_l=-2,m_s=-\frac{1}{2}\;and n=3,l=2,m_l=-1,m_s=-\frac{1}{2}\)
3. \(n=3,l=2,m_l=2,m_s=+\frac{1}{2}\;and \;n=4,l=2,m_l=2,m_s=+\frac{1}{2}\)