Select the correct option of the following statements.

P) Energy of an ${\mathrm{sp}}^2$ hybrid orbital is equal to that of an ${\mathrm{sp}}^3$  hybrid orbital. 

(Q} % s character in each ${\mathrm{sp}}^3{\mathrm{d}}^2$ hybrid orbital is different. (R) Adjacent ${\mathrm{sp}}^3{\mathrm{d}}^2$ hybrid orbitals are at $90°$ to one another. 

(S) Bond order of $\mathrm{C}-\mathrm{O}$ bond in ${{\mathrm{CO}}_3}^{-2}$ is 4/3.

Energy of an ${\mathrm{sp}}^2$ hybrid orbital is equal to that of an ${\mathrm{sp}}^3$ hybrid orbital is different” is an incorrect statement because for any specified hybrid orbital the energy for that particular orbital is different.

“The percentage s character in each ${\mathrm{sp}}^3{\mathrm{d}}^2$ hybrid orbital is different” is an incorrect statement because for same hybrid orbital percentage character is same.

Each pair of ${\mathrm{sp}}^3{\mathrm{d}}^2$ hybrid orbitals has a $90°$ angle between them. The bonds in the central square plane form $90°$angles with the axial bonds as well as with neighboring pairs of bonds.

Bond order of $\mathrm{C}-\mathrm{O}$ bond in ${{\mathrm{CO}}_3}^{-2}$ is 4/3