The correct answer is Vinegar.It is made up of an aqueous solution of acetic acid.The vinegar can have a small amount of flavorings added into it.The percentage of acetic acid present in vinegar is 5-20% by volume.Acetic acid is made by the fermentation of ethanol or sugar.Vinegar reacts with baking soda used as an ingredient in baking and produces brisk effervescence.This quality of vinegar shows that it is made up of an acidic ingredient.