Column I	Column II
a- ${\mathrm{Fe}}^{2+}$	p- Set of quantum no. for last ${\mathrm{e}}^{-}$ is $\mathrm{n}=2,\mathrm{l}=1$ $m=1,s=+\frac{1}{2}$
b- ${\mathrm{Mn}}^{+4}$	q- Magnetic moment $\left(\mu \right)=\text{ zero }$
c-${\mathrm{Zn}}^{+2}$	r- Spin multiplicity (SM)=4
d-${\mathrm{Na}}^{+}$	s- Total no. of exchange pairs in 3d-subshell =10
	t-Paramagnetic species

For ${\mathrm{Fe}}^{2+}$ total no. of exchange pairs in 3d-subshell is equal to 10 and it is a Paramagnetic species.

For ${\mathrm{Mn}}^{+4}$the magnetic moment is equal to zero and its nature is  paramagnetic species.
For ${\mathrm{Zn}}^{+2}$ the magnetic moment is equal to zero