Boron in green plants assists in

Options

A. in activation of enzymes
B. in nitrogen fixation
C. in photosynthesis
D. in sugar transport

Answer

### Step-by-Step Solution

1. **Identify the Role of Boron in Plants**:
- Boron is classified as a micronutrient in plants and plays a crucial role in various physiological processes.

2. **Understand the Functions of Boron**:
- Boron is involved in several functions such as:
- Pollination
- Cell wall formation
- Maintenance of cell structural integrity
- Sugar transport

3. **Focus on Sugar Transport**:
- One of the primary roles of boron is in the transport of sugars within the plant.
- It enhances the movement of sugars from the sites of photosynthesis (like leaves) to other parts of the plant, especially in growing regions and developing fruits.

4. **Link to Plant Growth**:
- The sugars transported are vital for root growth and the formation of root nodules, particularly in leguminous plants.

5. **Evaluate Other Options**:
- **Activation of Enzymes**: While important, this role is primarily associated with other minerals like magnesium.
- **Nitrogen Fixation**: Cobalt is essential for nitrogen-fixing microorganisms, not boron.
- **Photosynthesis**: Key minerals for this process include potassium and magnesium, not boron.

6. **Conclusion**:
- Based on the functions and roles discussed, the correct answer is that boron assists in **sugar transport** in green plants.