Which ligand among the following has the highest splitting power of $d$-orbitals of the central metal ion?

According to crystal field theory,the $M-L$ bond in a complex is

The electronic configuration of the central metal atom/ion in $\left[ Co(CN)_6 \right]^{3-}$ is

Select the correct order of $\Delta_o$ (Crystal Field Splitting Energy).

The degenerate orbitals of $[Cr(H_2O)_6]^{3+}$ are

The correct order of the wavelength of light absorbed by the following complexes is,
$A. [Co(NH_3)_6]^{3+}$
$B. [Co(CN)_6]^{3-}$
$C. [Cu(H_2O)_4]^{2+}$
$D. [Ti(H_2O)_6]^{3+}$
Choose the correct answer from the options given below: