If we replace all the fluoride  ligands from  ${\left[Co{F}_6\right]}^{3-}$ by oxalate ligand without changing the oxidation state and co-ordination number of central metal atom or ion, then, peredict which of the following increases in the newly formed complex.

a)  ${\text{Δ}}_{\text{0}}$  b) Number of  ${\text{t}}_{2g}$ electrons  c) Number of ${\text{e}}_g$ electrons
d) Number of optical isomers   e) Number of geometrical isomers,
f) EAN value   g) Stability of complex