Which of the following is parammagnetic ?

Options

A. `[CO(NH_(3))_(6)]^(3+)`
B. `[Ni(CO)_(4)]`
C. `[NiF_(4)^(2-)]`
D. `[Ni(CN)_(4)]^(2-)`

Explanation

To determine which of the given coordination compounds is paramagnetic, we need to analyze the electronic configurations of the metal ions in each compound and check for the presence of unpaired electrons.

### Step-by-Step Solution:

1. **Understanding Paramagnetism**:
- Paramagnetic substances have unpaired electrons in their electronic configuration.
- Diamagnetic substances have all electrons paired.

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