GKFix MCQ Question

Which of the following is an ionization isomer of [Co(NH₃)₅Br]SO₄?

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