Chemistry Question from JEE Main 2025 · 7 April, Shift 1

An octahedral complex having molecular composition $\mathrm{Co}.5\mathrm{NH}_3.\mathrm{Cl}.\mathrm{SO}_4$ has two isomers A and B. The solution of A gives a white precipitate with AgNO$\_3$ solution and the solution of B gives a white precipitate with BaCl$\_2$ solution. The type of isomerism exhibited by the complex is,