Which of the following is correct about Tetraamminedithiocyanato-s cobalt (III) tris(oxalato)cobaltate(III)?
a. Formula of the complex is [Co(SCN)2(NH3)4][Co(ox)3]
b. It is a chelating complex and show linkage isomerism
c. It shows optical isomerism
d. It shows geometrical isomerism