GKFix MCQ Question

In which isomer does Br⁻ act as a ligand?

• A. [Co(NH₃)₅(SO₄)]Br
• B. [Co(NH₃)₆]SO₄
• C. [Co(NH₃)₅Br]SO₄
• D. [Cr(NH₃)₆][Co(CN)₆]