Which one of the following is not a source of energy?
- AProtein
- BFat
- CVitamin
- DCarbohydrate
Solution & Step-by-step Explanation
Carbohydrates, fats, and proteins are macronutrients that undergo metabolic oxidation to provide energy (measured in calories) to the body. Vitamins are micronutrients essential for regulating biochemical processes and metabolic pathways, but they do not provide energy directly.