Unloading of minerals in leaves is

Options

A. Active process
B. Passive process
C. Simple diffusion
D. None of the above

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the unloading of minerals in leaves. This involves how minerals are transported from the veins to the leaf tissues.

2. **Identifying the Process**: The unloading of minerals occurs primarily through a process called diffusion. This is where minerals move from an area of higher concentration (in the veins) to an area of lower concentration (in the leaf tissues).

3. **Mechanism of Unloading**: The unloading process takes place at the fine vein endings in the leaves. As mineral ions reach these vein endings, they diffuse into the surrounding leaf cells.

4. **Role of Sinks**: The uptake of minerals occurs at specific sites known as sinks. In leaves, these sinks can include areas like apical and lateral meristems, where the minerals are utilized for growth and development.

5. **Evaluating Options**:
- **Option A (Active Process)**: This is not correct because unloading through diffusion does not require energy.
- **Option B (Prancing Process)**: This option is not relevant to the context of mineral unloading.
- **Option C (Simple Diffusion)**: This is correct as it describes the passive movement of minerals from the veins to leaf tissues.
- **Option D (None of them)**: This is incorrect since we have identified a correct option.

6. **Conclusion**: The correct answer to the question is **Option C (Simple Diffusion)**, as it accurately describes the unloading of minerals in leaves.