The possible quantum number for 3d electron are

$n=3, l=1, m_l=+1, m_s=-\frac{1}{2}$

$n=3, l=2, m_l=+2, m_s=-\frac{1}{2}$

$n=3, l=1, m_l=-1, m_s=+\frac{1}{2}$

$n=3, l=0, m_l=+1, m_s=-\frac{1}{2}$