(A) Carbohydrates
(B) Fats
(C) Proteins
(D) None of these
🧠 Explanation:
- Fats provide the highest energy among all nutrients, offering about **9 kilocalories per gram**.
- In comparison, **carbohydrates** and **proteins** each provide only **4 kilocalories per gram**.
- Due to this high energy density, fats are essential for long-term energy storage in the body.
- Hence, the nutrient with the **highest calorific value** is Fats, making option (B) correct.