The reaction between an acid and a base is known as _________.

Neutralization reaction

The correct answer is option 4. Neutralization reaction.

The reaction between an acid and a base is known as Neutralisation reaction.

In a neutralization reaction, an acid and a base react to form salt and water. This reaction typically involves the transfer of protons (H⁺ ions) from the acid to the base, resulting in the formation of water and salt. The resulting solution is neutral or close to neutral in pH, as the acidic and basic properties have been neutralized.