Beneficial mineral element accumulated by some plants is

Options

A. Selenium
B. Copper
C. Iron
D. Potassium

Answer

To solve the question about the beneficial mineral element accumulated by some plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Beneficial Mineral Elements**:
- Begin by defining what beneficial mineral elements are. These are minerals that may not be essential for all plants but can promote growth in certain species.

2. **Identifying Examples**:
- List some examples of beneficial mineral elements. According to the information provided, these include aluminium, cobalt, sodium, selenium, and silicon.

3. **Analyzing the Role of Selenium**:
- Focus on selenium, which is mentioned as a beneficial mineral element. Although it is not essential for all plants, it has been shown to improve growth in some taxa.

4. **Comparing with Other Options**:
- Examine the other options provided (copper, iron, potassium). These minerals are essential for plant growth but are not classified as beneficial in the same way as selenium.

5. **Conclusion**:
- Based on the analysis, conclude that selenium is the beneficial mineral element that is accumulated by some plants.

### Final Answer:
The beneficial mineral element accumulated by some plants is **selenium**.

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