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Which of the following pairs of isomers is not correctly matched with its type of isomerism ?
A. `[Cr(NH_(3))_(6)][Cr(CN)_(6)]` and `[Cr(NH_(3))_(4) (CN)_(2)][Cr(NH_(3))_(2)(CN)_(4)]`- Coordination isomerism
B. `[Co(NH_(3))_(5)NO_(2)]Cl_(2) ` and `[Co(NH_(3))_(5)ONO]Cl_(2)`-Linkage isomerism
C. `[Co(py)_(2) (H_(2)O)_(2)Cl_(2)]Cl` and `[Co(py)_(2)(H_(2)O)Cl_(3)]H_(2)O` - Coordination isomerism
D. `[Pt(NH_(3))_(4) Br_(2) ] Cl_(2)` and `[Pt(NH_(3))_(4) Cl_2]Br_(2)`- Ionisation isomerism

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Correct Answer - C
`[Co(py)_(2) (H_(2)O)_(2) Cl_(2)]Cl` and `[Co(py)_(2) (H_(2)O)Cl_(3)]H_(2)O` show hydrate isomerism .

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