The chemical bond due to the electrostatic attraction between oppositely charged ions are defined as ionic bonding. The ionic compounds are formed due to the electrostatic attraction between the metal and nonmetal.
In the ionic bond, electrons moves from one atom to another atom. Hence, it does not share the electrons.
Hence, the option A is wrong.
Covalent bond is different from ionic bond. In covalent bond, electrons are commonly shared by the atoms.
Hence, the option C is also wrong.
Covalent bond is strongest bond among the remaining all chemical bonding. Hence, the option D is also wrong.
In the ionic bond, electrons moves from one atom to another atom. Hence, it does not share the electrons.
Hence, the correct option is.