" In which of the following pairs both the complexes show optical isomerism "

In which of the following pairs both the complex show optical isomerism? .

In which of the following pairs both the complex show optical isomerism? .

In which of the following pairs both the complexes show geometrical isomerism?

In which of the following pairs both the complexes show geometrical isomerism?

In which of the following pairs both the complex show optical isomerism? . (a) cis- [Cr(C2O4)2CI2] 3−,cis−[Co(NH3)4CI2] b)[Co(en)3] CI3 , cis−[Co(en)2 CI2] CI (c) [Co(NO3 )3(NH3) 3] ,cis−[Pt(en)2 CI2] (d) [PtCI(en)CI] , [NiCI2Br2]2−

In which of the following pairs both the complexes do not show optical isomerism?

Which of the following can show both tautomerism and optical isomerism