An octahedral complex with molecular composition `M.5NH_(3).Cl.SO_(4)` has two isomers. A and B. The solution A gives a white precipitation with `AgNO_(3)` solution and the solution of B gives white precipitate with `BaCl_(2)` solution. The type of isomerism exhibited by the complex is :
A. linkage isomers
B. ionisation isomerism
C. coordination isomers
D. Geometrical isomerism
