Which of the following is a micronutrient required by the plants?

Options

A. Calcium
B. Sulphur
C. Zinc
D. Magnesium

Explanation

To determine which of the following is a micronutrient required by plants, we need to understand the classification of mineral nutrients.

### Step-by-Step Solution:

1. **Understand Nutrient Classification**:
- Nutrients required by plants are classified into two categories: macronutrients and micronutrients.
- Macronutrients are needed in larger quantities, while micronutrients are required in smaller amounts.

2. **Identify the Given Options**:
- The options provided are:
- A) Calcium
- B) Sulphur
- C) Zinc
- D) Magnesium

3. **Classify Each Option**:
- **Calcium**: This is a macronutrient, as it is required in larger amounts for plant growth.
- **Sulphur**: This is also classified as a macronutrient, necessary for protein synthesis and enzyme function.
- **Zinc**: This is a micronutrient, essential for various physiological functions in plants, including enzyme activity and growth regulation.
- **Magnesium**: This is another macronutrient, important for photosynthesis and as a central atom in chlorophyll.

4. **Conclusion**:
- Among the options provided, Zinc is the only micronutrient required by plants. Therefore, the correct answer is **C) Zinc**.

### Final Answer:
C) Zinc