Which of the following are macronutrients?

Options

A. Carbon, nitrogen
B. Oxygen, phosphorus
C. Potassium, sulphur
D. all of these

Explanation

To determine which of the following are macronutrients, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Macronutrients**:
- Macronutrients are essential elements that plants require in large amounts for their growth and development.

2. **Differentiate Between Macronutrients and Micronutrients**:
- Macronutrients are needed in larger quantities, while micronutrients are required in smaller amounts (often referred to as trace elements).

3. **Identify Common Macronutrients**:
- Common macronutrients include Carbon (C), Nitrogen (N), Oxygen (O), Phosphorus (P), Potassium (K), and Sulphur (S).

4. **Review the Given Options**:
- Check the options provided in the question to see which elements are listed.

5. **Match the Options with Known Macronutrients**:
- Compare the elements in the options with the list of known macronutrients.

6. **Conclude the Answer**:
- Since all the elements listed in the options (Carbon, Nitrogen, Oxygen, Phosphorus, Potassium, Sulphur) are recognized as macronutrients, the correct answer is "all of these."

### Final Answer:
- The macronutrients from the options provided are: **Carbon, Nitrogen, Oxygen, Phosphorus, Potassium, and Sulphur. Therefore, the correct answer is "all of these."**

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