GKFix MCQ Question

What is the correct format for writing the charge of [Cr(H2O)6]³⁺ when isolated?

• A. Cr(H2O)6+3
• B. [Cr(H2O)6]+3
• C. [Cr(H2O)6]³⁺
• D. (Cr(H2O)6)3+