Which of the following is NOT a type of complex carbohydrate?

Complex carbohydrates are made up of long chains of sugar molecules and are often rich in fiber, providing sustained energy. Starch, dextrin, and glycogen are all forms of complex carbohydrates.

Starch is a polysaccharide that plants use to store energy and is composed of many glucose units linked together. Dextrin, which is derived from starch, is a shorter chain carbohydrate also classified as a complex carb. Glycogen is the stored form of glucose in animals and fungi, serving a similar energy-storage function as starch does in plants.

On the other hand, glucose is a simple sugar, or monosaccharide, which is the most basic form of carbohydrate. It cannot be classified as a complex carbohydrate because it consists of a single sugar molecule rather than a chain of multiple sugar molecules. Therefore, glucose stands out as the correct answer since it does not fit the definition of complex carbohydrates.