How may essential elements are called ono mineral elements?

Options

A. 3
B. 5
C. 7
D. 9

Answer

To answer the question of how many essential elements are called non-mineral elements, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Essential Elements**:
- Essential elements are nutrients that plants require for growth and development. There are a total of 17 essential elements.

2. **Categorizing Essential Elements**:
- These 17 essential elements can be divided into two categories: mineral elements and non-mineral elements.
- Mineral elements are those that are usually absorbed from the soil in ionic form.

3. **Identifying Non-Mineral Elements**:
- Non-mineral elements are typically absorbed in molecular form and include:
- Carbon (C)
- Hydrogen (H)
- Oxygen (O)

4. **Counting Non-Mineral Elements**:
- From the list, we see that there are 3 non-mineral elements: Carbon, Hydrogen, and Oxygen.

5. **Conclusion**:
- Therefore, the answer to the question is that there are 3 essential elements that are classified as non-mineral elements.

### Final Answer:
The number of essential elements that are called non-mineral elements is **3**.