Partial mineral element is -

Options

A. N
B. P
C. K
D. Fe

Answer

To determine which of the given options is a partial mineral element, we need to analyze the definitions and classifications of the mineral elements required by plants.

### Step-by-Step Solution:

1. **Understanding Mineral Elements**:
- Mineral elements are essential for plant growth and development. They are categorized into two groups: macronutrients and micronutrients.

2. **Identifying Macronutrients and Micronutrients**:
- Macronutrients are required in larger quantities and include elements like Nitrogen (N), Phosphorus (P), and Potassium (K).
- Micronutrients are required in smaller amounts and include elements like Iron (Fe).

3. **Analyzing the Options**:
- **Option 1: Nitrogen** - A macronutrient essential for the synthesis of nucleic acids, proteins, and amino acids.
- **Option 2: Phosphorus** - Another macronutrient important for energy transfer and nucleic acid formation.
- **Option 3: Potassium** - A macronutrient that plays a role in osmoregulation and enzyme activation.
- **Option 4: Iron** - A micronutrient essential for chlorophyll synthesis and electron transport in photosynthesis.

4. **Determining the Partial Mineral Element**:
- Among the options, Nitrogen is often referred to as a partial mineral element because it is a major component of essential macromolecules and is present in significant amounts in plants (1-3% of plant mass).

5. **Conclusion**:
- Based on the definitions and classifications, the correct answer is **Option 1: Nitrogen**.