The coordination number of a central metal atom in a complex can be determined by $......$.
- AThe number of ligands surrounding the metal ion bonded by $\sigma$ bonds
- BThe number of ligands surrounding the metal ion bonded by $\pi$ bonds
- CThe number of ligands surrounding the metal ion bonded by both $\sigma$ and $\pi$ bonds
- DThe number of metal ions surrounded only by anions
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