Which pair exhibits linkage isomerism?

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[Cr(NH₃)6]3+ and [Cr(H₂O)6]3+ [Cr(H₂O)4Cl₂]+ (cis and trans) [Cr(NH₃)5Cl]SO₄ and [Cr(NH₃)5SO₄]Cl [Cr(H₂O)5CN]2+ and [Cr(H₂O)5NC]2+ Correct

CN− binds via C or N, showing linkage isomerism.

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