c
\(\left.\begin{array}{l}{\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4}\left(\mathrm{NO}_{2}\right)_{2}\right] \mathrm{Cl}} \\ {\left.\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4}(\mathrm{NO})_{2}\right] \mathrm{Cl}\right] \mathrm{NO}_{2}}\end{array}\right\}\) lonisation isomer

\(\left.\begin{array}{l}{\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4}\left(\mathrm{NO}_{2}\right)_{2}\right] \mathrm{Cl}} \\ {\left.\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4}(\mathrm{ONO})_{2}\right] \mathrm{Cl}\right] }\end{array}\right\}\)Linkage isomers