Which of the following is the major component of vinegar?

Acetic acid

The correct answer is option 4. Acetic acid.

The major component of vinegar is Acetic acid.

Vinegar is primarily composed of acetic acid, which is a weak organic acid. Acetic acid gives vinegar its characteristic sour taste and pungent odor. Vinegar is typically produced through the fermentation of ethanol (alcohol) by acetic acid bacteria, resulting in the formation of acetic acid. While other acids such as lactic acid and citric acid may be present in small amounts in certain types of vinegar, acetic acid is the main acid component responsible for vinegar's acidity and flavor profile.