Which of the following complex ions has electrons that are symmetrically filled in both $t_{2g}$ and $e_{g}$ orbitals ?

Question

$\begin{array}{1 1} [CoF_6]^{3-}\\ [Co(NH_3)_6]^{3-} \\ [CoCl_4]^{2-} \\ [Co(H_2O)_6]^{2+} \end{array} $