The complex which exhibits linkage isomerism is

The essential condition for a complex to exhibit linkage isomerism is,

the presence of ambidente ligand like ${\mathrm{ONO}}^{-}, {\mathrm{SCN}}^{-},{\mathrm{CN}}^{-};$

$\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\mathrm{ONO}\right]\mathrm{Cl} \mathrm{and} \left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5{\mathrm{NO}}_2\right]\mathrm{Cl}$are linkage isomers;