The pair(s) of complexes where in both exhibit tetrahedral geometry is(are)

${\text{[Ni}{\text{(CN)}}_4]}^{2-}$ - has square planar geometry, $\left[\mathrm{Ni}{\left(\mathrm{CO}\right)}_4\right]$ - Tetrahedral geometry 

Other pairs have the  Tetrahedral geometry.

A) ${\left[{\mathrm{FeCl}}_4\right]}^{-}$
Fe⁺³=3d⁵, Cl⁻ weak field ligand, sp³
${\left[\mathrm{Fe}{\left(\mathrm{CO}\right)}_4\right]}^{2-}$
Fe⁻²=3d⁸4s²
CO strong field ligand pairing occurs
Fe⁻²=3d¹⁰
Hence sp³
(B) ${\left[\mathrm{Co}{\left(\mathrm{CO}\right)}_4\right]}^{-}$
Co=3d⁸4s²
Due to CO pairing occurs
Hence, =3d¹⁰
${\left[{\mathrm{CoCl}}_4\right]}^{2-}$
Co⁺²=3d⁷,
Cl⁻ weak field ligand, sp³
(D)${\left[\mathrm{Cu}{\left(\mathrm{Py}\right)}_4\right]}^{+}$
Cu⁺¹=3d¹⁰,sp³
${\left[\mathrm{Cu}{\left(\mathrm{CN}\right)}_4\right]}^{3-}$
Cu⁺¹=3d¹⁰,sp³