Coordination Compounds

The correct order of the wavelength of light absorbed by the following complexes is,

A. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$

B. $\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}$

C. $\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_4\right]^{2+}$

D. $\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$

Choose the correct answer from the options given below: