Is glucose a simple carbohydrate?

The major simple carbohydrates or sugars are glucose, maltose, fructose, and sucrose which come from plants. Lactose is found in milk. We generally think of grains (Bread & Cereal group) as the only source of carbohydrates. ... SUGARS - Glucose is the major kind of simple sugar.
https://nutritions4.com/nucentix-gs-85-review/