Which of the following is a component all three dietary disaccharides?

Glucose

Explanation:

All three dietary disaccharides (sucrose, lactose and maltose) consist of two monosaccharides linked together by a glycosidic bond. Glucose is one of the two monosaccharides present in all three disaccharides. The other monosaccharide can be fructose (sucrose), galactose (lactose) or glucose (maltose).