$[PdCl_2(PMe_3)_2]$ is a diamagnetic complex of $Pd(II)$. How many total isomers are possible for the analogous paramagnetic complex of $Ni(II)$?

Which of the following is true about the complex $[PtCl_2(H_2O)(NH_3)]$?

Given below are two statements:
Statement-$I$ : The number of paramagnetic species among $[CoF_6]^{3-}$, $[TiF_6]^{3-}$, $V_2O_5$ and $[Fe(CN)_6]^{3-}$ is $3$.
Statement-$II$ : $K_4[Fe(CN)_6] < K_3[Fe(CN)_6] < [Fe(H_2O)_6]SO_4 \cdot H_2O < [Fe(H_2O)_6]Cl_3$ is the correct order in terms of number of unpaired electron$(s)$ in the complexes.
In the light of the above statements, choose the correct answer from the options given below.

Consider the following complex ions $P = [FeF_6]^{3-}$,$Q = [V(H_2O)_6]^{2+}$,$R = [Fe(H_2O)_6]^{2+}$. The correct order of the complex ions,according to their spin-only magnetic moment values (in $B.M.$) is:

Which of the following complexes of $Co^{3+}$ shows more than one type of isomerism?

Which isomerism is possible in hexa-ammine cobalt$(III)$ hexa-cyanido chromate$(III)$ complex?