A digestive enzyme salivary amylase (present in saliva) begins digestion of ?

Concept: The salivary glands, which are found in the buccal cavity and mouth, secrete saliva as well as salivary amylase, an enzyme that breaks down carbohydrates. 

Unlike salivary amylase, which breaks down carbs and turns them into the disaccharide maltose to begin the digestion of carbohydrates, saliva is responsible for mixing up the meal and lubricating it to facilitate its onward passage in the alimentary canal. At a pH of roughly 6.8, an enzyme that breaks down carbohydrates begins to hydrolyze. Approximately 30% of the starch is hydrolyzed by this enzyme.

Hence, the correct answer is option D