Which pair represents ionization isomerism?

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[Cr(NH₃)6]3+ and [Cr(NH₃)5Cl]2+ [Cr(NH₃)4Cl₂]+ (cis and trans) [Cr(NH₃)5NO₂]2+ and [Cr(NH₃)5ONO]2+ [Cr(NH₃)5Cl]SO₄ and [Cr(NH₃)5SO₄]Cl Correct

[Cr(NH₃)5Cl]SO₄ and [Cr(NH₃)5SO₄]Cl differ by exchanging Cl− and SO₄₂− between the coordination sphere and counter ion.

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