In an ionic compound, the ability of a cation to attract the electrons of an anion is called polarizing power. Due to the polarizability of anion, it gets distorted & sharing of electrons takes place and ionic compounds possess some covalent character.
Greater the polarization, the greater the covalent character.
The Correct Option is (C): A, B & C
Such a group of atoms is called a molecule. Obviously, there must be some force that holds these constituent atoms together in the molecules. The attractive force which holds various constituents (atoms, ions, etc.) together in different chemical species is called a chemical bond.
There are 4 types of chemical bonds which are formed by atoms or molecules to yield compounds.