Which of the following is NOT one of the major classes of nutrients?

C is the correct answer because starch is not considered one of the major classes of nutrients. The major classes of nutrients include carbohydrates, fats, proteins, vitamins, and minerals. Carbohydrates and fats are fundamental energy sources for the body, while vitamins are essential for various biochemical processes and promoting overall health.

Starch, although it is a carbohydrate and serves as a significant energy source, is not classified as a major nutrient on its own. Instead, it is a type of carbohydrate. The distinction lies in the fact that when discussing major classes of nutrients, we refer to broader categories, while starch is a specific form of carbohydrate. Thus, it does not fit the criteria for being listed as one of the primary classes of nutrients.