Which of the alkali metal chlorides is expected to have the highest melting point ?

Based on lattic energy and other considerations, which one of the following alkali metal chloride is expected to have the highest melting point ?

Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point

Based on lattic energy and other considerations, which one of the following alkali metal chloride is expected to have the highest melting point ?

Which of the following alkali metal chlorides is expected to have the highest melting point (i) LiCl (ii) KCl (iii) RbCl (iv) NaCl .