<u>Answer:</u> The correct answer is ionic bond.
<u>Explanation:</u>
Ionic bond is defined as the bond which is formed by the complete transfer of electrons from one atom to another atom. The atom which donates the electrons is known as electropositive atom and the one which accepts the electrons is known as electronegative atom.
Polar bond is defined as the bond which is formed when difference in electronegativity value is there.
Covalent bond is defined as the bond which is formed by the sharing of electrons between the atoms forming a bond.
Metallic bond is defined as the bond which is formed from the electrostatic attraction between the free electrons and positively charged metal ions.
From the above information, the correct answer is ionic bond.
