Which of the following elements can be considered as macronutrients for plants?

Options

A. Zinc
B. Boron
C. Nickel
D. phosphorus

Answer

To determine which elements can be considered as macronutrients for plants from the given options (Zinc, Boron, Nickel, and Phosphorus), we can follow these steps:

### Step-by-Step Solution:

1. **Understand Macronutrients and Micronutrients**:
- Macronutrients are essential nutrients that plants require in larger quantities for their growth and development.
- Micronutrients, on the other hand, are needed in smaller amounts.

2. **Identify the Elements**:
- The elements provided in the question are Zinc, Boron, Nickel, and Phosphorus.

3. **Classify Each Element**:
- **Zinc**: This is classified as a micronutrient. It is essential for various enzymatic functions but is required in small amounts.
- **Boron**: This is also a micronutrient. It plays a role in cell wall formation and reproductive development but is needed in trace amounts.
- **Nickel**: This is another micronutrient. It is involved in certain enzyme functions and is required in very small quantities.
- **Phosphorus**: This is classified as a macronutrient. It is vital for energy transfer (ATP), nucleic acids, and is a key component of cell membranes.

4. **Conclusion**:
- Out of the four elements listed, only Phosphorus is considered a macronutrient. The other three (Zinc, Boron, and Nickel) are all micronutrients.

5. **Final Answer**:
- The correct answer is **Phosphorus**.