The reverse process of neutralisation is :

When an acid and a base react to produce water and salt, it is known as a neutralisation reaction since ${\mathrm{H}}^{+}$ ions and OH are both involved.

−ions produce water. A pH of 7 results from the neutralisation of a potent acid and potent base.

Water is used in a procedure called hydrolysis to break a molecule's link. The pH of a solution is frequently changed by the process, which primarily involves an ion and water molecules. Hydrolysis is endothermic while neutralisation is exothermic. As a result, choice A is accurate.