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 elements is required in minor for the growth of plants but is extremely important for the growth of animals?", we can follow these steps:

### Step 1: Analyze the Options
We need to evaluate each option provided to determine which element fits the criteria of being minor for plants but crucial for animals.

### Step 2: Evaluate Each Option
1. **Nitrogen**:
- Nitrogen is a major component of chlorophyll and is essential for plant growth. It is not a minor element for plants.
- **Conclusion**: Incorrect option.

2. **Oxygen**:
- Oxygen is necessary for cellular respiration in both plants and animals. Plants also require oxygen for energy storage in the form of ATP.
- **Conclusion**: Incorrect option.

3. **Sodium**:
- Sodium is required in minor amounts for plant growth, primarily for osmoregulation and enzyme function. However, it is extremely important for animals, particularly in nerve function and fluid balance.
- **Conclusion**: Correct option.

4. **Carbon**:
- Carbon is a fundamental element for all living organisms, including plants, as it is a key component of carbohydrates and other organic molecules.
- **Conclusion**: Incorrect option.

### Step 3: Final Answer
Based on the evaluations, the correct answer is **Sodium** (Option 3), as it is required in minor amounts for plant growth but is extremely important for animal growth.

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