The correct answer is a. Fats, phospholipids, and steroids.
Why not other options? Because:
b. Fructose and glucose are both sugars and
c. DNA and RNA are nucleic acids that are both composed of a phosphate group, five-carbon sugar (in case of DNA - stable 2-deoxyribose and RNA - less stable ribose), and four nitrogen-containing nucleobases: adenine, guanine, cytosine, thymine (only DNA), uracil (only RNA).
