What is a type of carbohydrate?

breads, wheat, cereal, rice, tortillas, potatoes, and so on.

(hint: anything at the bottom of the food pyramid is basically a carbohydrate.)

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The above mentioned are not carbohydrates; they are foods containining carbohydrates.

Carbohydrates are: glucose, sucrose, fructose, maltose, galactose, starch and many others.