Carbohydrates, lipids and proteins are

Options

A. Macronutrient or proximate principles of food`
B. Macronutrient or protective principles of food
C. Macronutrient or protective principles of food
D. Micronutrient or proximate principles of food

Answer

**Step-by-Step Solution:**

1. **Understanding Macronutrients**: Carbohydrates, lipids, and proteins are classified as macronutrients. This means they are nutrients that the body requires in large amounts to function properly.

2. **Role of Carbohydrates**: Carbohydrates are primarily energy-giving nutrients. They are the body's main source of energy and are found in foods like grains, fruits, and vegetables.

3. **Role of Lipids**: Lipids, commonly known as fats, also serve as a significant source of energy. They are essential for the absorption of certain vitamins and provide insulation and protection for organs.

4. **Role of Proteins**: Proteins are known as the building blocks of the body. They are crucial for growth, repair, and maintenance of body tissues. Proteins are found in foods such as meat, dairy products, legumes, and nuts.

5. **Classification of Nutrients**: Macronutrients (carbohydrates, lipids, and proteins) are required in larger quantities compared to micronutrients (vitamins and minerals), which are needed in smaller amounts.

6. **Conclusion**: Therefore, carbohydrates, lipids, and proteins are classified as macronutrients or proximate principles of food, as they are essential for energy and structural functions in the body.