Answer: The correct answer for the fill in the blank is B), C), and D)

Carbohydrates are the large group of organic compounds, which are formed by carbon, hydrogen, and oxygen.

Carbohydrates are the most important source of energy in the living organisms. They mainly include sugars ( like glucose, fructose) and starches ( present in food like potato, grains, rice).

There are four macromolecules present in the living organisms. These are nucleic acid, carbohydrates, proteins, and lipids. Carbohydrates are the largest of these four macromolecules.

Thus, option B), C), and D) is correct for the carbohydrates.