Which one of the following trend correctly represents the increasing order of covalent character ?

Covalent character ∝ Polarising power of cation     Polarizing power∝ 1size of cation    Polarising power of  K+ < Mg2+ < Zn2+ ;K+ and Mg2+ have inert gas configuration whereas Zn2+ has pseudo inert gas configuration ;Note : Increasing order means “ least to highest” ;