Which of the following is not correct w.r.t. covalent character of ionic bond?

For same size and charge of cation, the one with electronic configuration n-1dxns0 is more polarising than the cation having ns2np6 electronic configuration.

Cation polarises the anion.

Electronic charge shifts towards cation to create covalent character.

Smaller the charge on cation and anion, greater is the covalent character.