Capacity of solvent to neutralise charge on ionic compound is called :-
(a) Solvation Energy - A energy required to neutralize the charge, when dissolved molecule and solvent interact.
(b) Dielectric constant - It is used to identify potential energy.
(c) Dipole moments - It shows the separation of charges.
(d) Solubility -capacity of solute to dissolve in the solvent.
Hence, option(a) is the correct answer.