The reaction between an acid and a base is known as _______

Correct option is A

The answer is (a) Neutralisation reaction.
A neutralisation reaction is a chemical reaction that occurs when an acid and a base react to form a salt and water. The salt is the product of the negative ion of the acid and the positive ion of the base. The water is formed from the reaction of the hydrogen ion of the acid and the hydroxide ion of the base.
For example, the reaction of hydrochloric acid (HCl) and sodium hydroxide (NaOH) forms sodium chloride (NaCl) and water (H2O).

The neutralization reaction is a type of double displacement reaction, which means that the ions of the reactants swap partners to form the products.
The neutralization reaction is a very important reaction in chemistry. It is used in many applications, such as in the production of soaps and detergents, in the treatment of acid reflux, and in the neutralization of hazardous waste.