The correct answer is A. lactose.
Lactose is a disaccharide sugar found in milk. It is made up of two monosaccharides, glucose and galactose. Lactose is a major source of energy for infants and young children. It is also used in many processed foods, such as dairy products, baked goods, and candy.
Maltose is a disaccharide sugar that is formed when two glucose molecules are joined together. It is found in malt, which is made from germinated barley. Maltose is also used in the brewing industry to make beer.
Galactose is a monosaccharide sugar that is found in milk and other dairy products. It is also found in some fruits and vegetables. Galactose is used in the production of lactose-free milk and other dairy products.
Sucrose is a disaccharide sugar that is made up of glucose and fructose. It is the most common type of sugar found in food. Sucrose is used in many processed foods, such as candy, baked goods, and soft drinks.