a disaccharide is formed when two monosaccharides join. which of the following pair forms a disaccharide?

The pair that forms a disaccharide is two monosaccharides joined together , such as:

• Glucose + fructose → sucrose

• Glucose + galactose → lactose

• Glucose + glucose → maltose

In exam-style questions, the correct option is the one that shows two monosaccharides (for example, “glucose and fructose”) because a disaccharide is defined as a sugar made of exactly two monosaccharide units linked by a glycosidic bond.