Identify the homoleptic complex(es) that is/are low spin.
(A) ${\left[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NO}\right]}^{2-}$
(B) ${\left[{\mathrm{CoF}}_6\right]}^{3-}$
(C) ${\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]}^{4-}$
(D) ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$
(E) ${\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$
Choose the correct answer from the options given below :

(A) ${\left[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NO}\right]}^{-2}\to$ Heteroleptic, ${\mathrm{Fe}}^{+2}, 3{\mathrm{d}}^6,{{\mathrm{t}}_{2\mathrm{g}}}^6{\mathrm{e}}_{\mathrm{g}}^0,{\mathrm{d}}^2{\mathrm{sp}}^3$Low spin (3d series + SFL)
(B) ${\left[{\mathrm{CoF}}_6\right]}^{-3}\to$ Homoleptic, ${\mathrm{sp}}^3{\mathrm{d}}^2,$ High spin, ${\mathrm{Co}}^{+3},3{\mathrm{d}}^6$ (3 d series +WFL)
(C) ${\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]}^{-4}\to$ Homoleptic
${\mathrm{Fe}}^{+2},3{\mathrm{d}}^6,{\mathrm{d}}^2{\mathrm{sp}}^3,{{\mathrm{t}}_{2\mathrm{g}}}^6{\mathrm{eg}}^0$ Low spin
(3 d series +SFL)
(D) ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{+3}\to$ Homoleptic, ${\mathrm{Co}}^{+3}3{\mathrm{d}}^6,{\mathrm{d}}^2{\mathrm{sp}}^3,{{\mathrm{t}}_{2\mathrm{g}}}^6{\mathrm{eg}}^0,$ Low spin (3d series +SFL )
(E) ${\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{+2}\to$ Homoleptic
${\mathrm{Cr}}^{+2}3{\mathrm{d}}^4,{\mathrm{d}}^2{\mathrm{sp}}^3,$ High spin ${{\mathrm{t}}_{2\mathrm{g}}}^3{{\mathrm{e}}_{\mathrm{g}}}^1$
(3d series + WFL)