GKFix MCQ Question

What is the correct formula for a complex with one Co³⁺ ion, four NH₃ ligands, and two Cl⁻ ligands?

• A. Co(NH₃)₄Cl₂
• B. [CoCl₂(NH₃)₄]
• C. [Co(NH₃)₄Cl₂]⁺
• D. [Co(NH₃)₄Cl₂]⁻