Which set does not show correct matching?

The electronic configuration: 

${\mathrm{Sc}}^{3+}:\left[\mathrm{Ar}\right]3{\mathrm{d}}^{0}4{\mathrm{s}}^0$

$\mathrm{Sc}:\left[\mathrm{Ar}\right]3{\mathrm{d}}^{1}4{\mathrm{s}}^2$ Thus, d-block IIIB group 

$\mathrm{Cr}:\left[\mathrm{Ar}\right]3{\mathrm{d}}^{5}4{\mathrm{s}}^1$ VIB group

${\mathrm{Fe}}^2:\left[\mathrm{Ar}\right]3{\mathrm{d}}^6$

$\mathrm{Fe}\left[\mathrm{Ar}\right]3{\mathrm{d}}^{6}4{\mathrm{s}}^2$ VIII group

So, the correct option is A.