The correct answer is D. Maltose.
Monosaccharides are the simplest form of sugar. They are made up of one sugar molecule. Glucose, galactose, and fructose are all monosaccharides. Maltose is a disaccharide, which means it is made up of two sugar molecules.
Glucose is the most common type of sugar in the body. It is the main source of energy for cells. Galactose is found in milk and milk products. Fructose is found in fruits and honey. Maltose is formed when two glucose molecules are joined together. It is found in malt, which is used to make beer and other alcoholic beverages.
Monosaccharides are important because they are the building blocks of carbohydrates. Carbohydrates are the main source of energy for the body. They are also used to build and repair tissues.