find the no. of isomers for Pd[(NH3)2(ONO)2]

Q.
The number of isomers (excluding geometrical isomers) for (A) is:

Q. No. of geometrical isomers for the molecules?

Q. $\left[NI\right(Cl{)}_2\left(P\right(C{H}_3{)}_3{)}_2]$ is a paramagnetic complex of Ni(II), Analgous Pd(II) complex is diamagnetic. How many geometrical isomers will be possible for Ni(II) and Pd(II) complexes? Also explain their magnetic behaviour.

Q. No. of geometrical isomers for the molecules if R is same?

Q. The no. of geometrical isomer(s) possible for $[CoC{l}_{2}B{r}_2{]}^{2-}$ (tetrahedral) is/are :