Choose the correct statement(s):

The stability of half filled d-subshell in ${\mathrm{Mn}}^{2+}$ can be related to its $E^{\circ }$ value

The stability of completely filled $d^{10}$ configuration in ${\mathrm{Zn}}^{2+}$can be related to its $E^{\circ }$ value,

$E^{\circ }$ for $\mathrm{Ni}$ is related to the highest negative ${\mathrm{\Delta }}_{\text{hyd }}$ ${\mathrm{H}}^{\circ }$

All the above