Which of the following element is required in minor for the growth of plants but is extremely important for growth of animals ?

Options

A. Nitrogen
B. Oxygen
C. Sodium
D. Carbon

Answer

To solve the question "Which of the following element is required in minor for the growth of plants but is extremely important for growth of animals?", we need to analyze the options provided: nitrogen, oxygen, sodium, and carbon.

### Step-by-Step Solution:

1. **Understanding the Role of Each Element**:
- **Nitrogen**: This is a macronutrient essential for both plants and animals. It is a major component of amino acids, proteins, and nucleic acids. Therefore, it is not the correct answer.
- **Oxygen**: This element is also a macronutrient and is vital for respiration in both plants and animals. It is not the correct answer.
- **Carbon**: Carbon is a fundamental building block of life and is required in large amounts by both plants and animals. It is not the correct answer.
- **Sodium**: Sodium is classified as a micronutrient for plants, meaning it is required in smaller amounts. However, it is an essential macronutrient for animals, playing a critical role in maintaining electrolyte balance and membrane potential.

2. **Identifying the Correct Answer**:
- Based on the analysis, sodium is the only element that fits the criteria of being required in minor amounts for plant growth but is extremely important for animal growth.

3. **Conclusion**:
- The correct answer is **Sodium**.

### Final Answer:
**Sodium**

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