The correct statements from following are:
A. The strength of anionic ligands can be explained by crystal field theory.
B. Valence bond theory does not give a quantitative interpretation of kinetic stability of coordination compounds.
C. The hybridization involved in formation of $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ complex is $\mathrm{dsp}^2$
D. The number of possible isomer(s) of cis-$\left[\mathrm{PtCl}_2(\mathrm{en})_2\right]^{2+}$ is one
Choose the correct answer from the options given below: