GKFix MCQ Question

Which of the following pairs represents ionization isomers?

• A. [Co(NH₃)₆]Cl₃ and [Co(NH₃)₅Cl]Cl₂
• B. [Co(NH₃)₅(SO₄)]Br and [Co(NH₃)₅Br]SO₄
• C. [CrCl₂(ox)₂]³⁻ cis and trans forms
• D. [Co(NH₃)₅NO₂]Cl₂ red and yellow