Which of the following complexes has a geometry different from others ?

Which of the following complexes has a geometry different from others ?
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Which of the following complexes has a geometry different from others ? A. `[NiCl_(4)]^(2-)` B. `Ni(CO)_(4)` C. ` ... (2-)` D. `[Zn(NH_(3))_(4)]^(2+)`
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