The correct option is D Ionic product of water
Sodium chloride is a salt of strong base NaOH and strong acid HCl. In its aqueous solution, following equilibrium is observed.
NaCl+H2O⇌Na++Cl−+H2O
Hence, no hydrolysis takes place in this case, and the solution remains neutral. Thus, here the product of molar concentrations of hydrogen ions and hydroxide ions is ionic product of water.