Consider the following statement .

(P) Blue salt ${\mathrm{K}}_4\left[\mathrm{Mn}(\mathrm{CN}{)}_6\right]\cdot 3{\mathrm{H}}_2\mathrm{O}$ is isostructural with the hexacyanoferrates (II) and the former  complex is paramagnet but later one is diamagnetic.

(Q) In the series of isoelectronic species ${\left[\mathrm{V}(\mathrm{CO}{)}_6\right]}^{-}$ , $\left[\mathrm{Cr}(\mathrm{CO}{)}_6\right]\text{ and }{\left[\mathrm{Mn}(\mathrm{CO}{)}_6\right]}^{+}$ from the vanadium to manganese complexes there is reduction in the strength of the bonding between metal and carbon and an increase in that in the carbonyl group (i.e CO).

(R) Chlorotris (triphenylphosphine) rhodium (I) is a square planar diamagnetic complex which is used as a homogeneous catalyst in hydrogenation of alkenes.

(S) Like ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_4{\mathrm{Cl}}_2\right]}^{+}$ ion, ${\left[\mathrm{Co}(\mathrm{en}{)}_2{\mathrm{Cl}}_2\right]}^{+}$ ion can exist in cis and trans forms and neither can display optical activity.

(T)  $\mathrm{Ni}(\mathrm{CO}{)}_4\text{ and }{\mathrm{NiCl}}_2{\left({\mathrm{PPh}}_3\right)}_2$ have same hybridization but different, magnetic moment and effective atomic number.

Which of the above statements are correct?