(A) [Cr(NH‌3)‌5CI]Cl‌2 and [Cr(NH‌3)‌4CI‌2)Cl‌1 both compounds will not show either structural or stereoisomerism. (B) [Co(NH‌3)‌4Cl‌2]‌+ and [Pt(NH‌3)‌2(H‌2O)CI]*‌1 Ma‌4 b‌2 type (octahedral), Ma‌2 bc type (square planar) and both will show geometrical isomerism. (C) [CoBr‌2CI‌2]‌2− and [PtBr‌2CI‌2]‌2−, Ma‌2 b‌2 type (tetrahedral), Ma‌2 b‌2, (square planar). (D) [Pt(NH‌3)‌3 (NO‌3)]CI and [Pt(NH‌3)‌3Cl]Br both will show ionisation isomerism.