Which of the following pairs contain only tetrahedral complexes ?

Options

A. `[MnCl_4]^(2-)` and `[Ni(CN)_4]^(2-)`
B. `[ZnCl_4]^(2-)` and `[MnCl_4]^(2-)`
C. `[ZnCl_4]^(2-)` and `[Ni(CN)_4]^(2-)`
D. `[Zn(NH_3)_4]^(2+)` and `[Cu(NH_3)_4]^(2-)`