# Which of the following cannot show linkage isomerism?A) NO$_2$ $^{-}$B) SCN$^{-}$C) CN$^{-}$D) NH$_3$

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Hint: Linkage isomerism is relatable with the ambidentate ligands. Ambidentate ligands can coordinate from more than one site. We are given with the four different ligands. So, identify the ambidentate ligands, and the ligand that doesn’t show linkage isomerism would be known.The correct option is often used as a rocket fuel, production of urea and an ingredient in fertilizers.

In the last we can conclude that NH$_3$ (ammine) ligand will not show linkage isomerism.