Select the CORRECT statements?

(i) $\left[Zn{(gly)}_2\right]$  is optically active compound

(ii) ${\left[PdClBr\left(gly\right)\right]}^{\Theta }$  exhibits geometrical isomerism

(iii) ${\left[IrB{r}_4\left(en\right)\right]}^{\Theta }$  exhibits cis trans isomerism        

(iv) ${\left[RhC{l}_2{\left(N{H}_3\right)}_4\right]}^{+}$  number of stereo isomers is equal to number of geometrical isomers