GKFix MCQ Question

Which of the following pairs represents linkage isomers?

• A. [Co(NH₃)₆]³⁺ and [Co(NH₃)₅Cl]²⁺
• B. [Cr(NH₃)₆][Co(CN)₆] and [Co(NH₃)₆][Cr(CN)₆]
• C. [Co(NH₃)₅(NO₂)]²⁺ and [Co(NH₃)₅(ONO)]²⁺
• D. [Co(en)₃]³⁺ and [Co(en)₂Cl₂]⁺