The correct statement with respect to the complexes `Ni(CO)_(4)` and `[Ni(CN)_(4))^(2-)` is :
The correct statement with respect to the complexes `Ni(CO)_(4)` and `[Ni(CN)_(4))^(2-)` is :
A. nickel is in same oxidation state in both
B. both have tetrahedral geometry
C. both have square planar geometry
D. have square planar and tetrahedral geometry respectively
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