Which of the following is an example of a carbohydrate?

Glucose is a simple sugar and is classified as a carbohydrate due to its structure and function in living organisms. Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen, typically with a general formula of (CH2O)n, where 'n' represents the number of carbon atoms. Glucose serves as a primary energy source for cells, playing a crucial role in cellular respiration, where it is metabolized to produce energy.

In contrast, proteins are made of amino acids and are primarily involved in building and repairing tissues, functioning as enzymes, hormones, and antibodies. Lipids, which include fats and oils, are composed of long chains of carbon and hydrogen and serve as energy storage, insulation, and structural components of cell membranes. Vitamins, like Vitamin C, are organic compounds necessary for various bodily functions but do not fall under the category of carbohydrates. Therefore, glucose stands out as the clear example of a carbohydrate among the options provided.