Answer: The correct answer is ionic bond.
Step-by-step explanation:
Ionic bond is defined as the bond which is formed by the complete transfer of electrons from one element to another element. The atom which looses electrons is known as electropositive atom and the atom which gains electron is known as electronegative atom. This bond is formed by the electrostatic attraction between two oppositely charged ions.
Covalent bond is defined as the bond which is formed from the sharing of electrons between the atoms forming a compound.
Hydrogen bond is defined as the weak bond which is formed by the electrostatic attraction of a proton of hydrogen ion and the electronegative atom such as oxygen, nitrogen and fluorine.
Metallic bond is defined as the bond which is formed when two positively charged atoms having free electrons are shared among a lattice of cations.
From the above information, the correct answer is Ionic bond.