A 1 : 3 electrolyte in an aqueous solution is [Re-NEET 2026]

\([{\mathrm{CoCl}}_{2}{({\mathrm{NH}}_{3})}_{4}]\mathrm{Cl}\)

\([\mathrm{CoCl}{({\mathrm{NH}}_{3})}_{5}]{\mathrm{Cl}}_{2}\)

\([\mathrm{Co}{({\mathrm{NH}}_{3})}_{6}]{\mathrm{Cl}}_{3}\)

\([\mathrm{Co}{({\mathrm{NH}}_{3})}_{3}{({\mathrm{NO}}_{2})}_{3}]\)