The non-mineral elements are

Options

A. C, H, O
B. N, Ca, Mg
C. Fe, Co, Mn
D. Cu, Mo, N

Answer

### Step-by-Step Solution:

1. **Understanding Non-Mineral Elements**:
- Non-mineral elements are those elements that are not derived from the soil but are obtained from other sources such as air and water.

2. **Identifying Non-Mineral Elements**:
- The primary non-mineral elements are carbon (C), hydrogen (H), and oxygen (O).
- These elements are essential for plant life and are derived from:
- Carbon is sourced from carbon dioxide (CO₂) in the air.
- Hydrogen is sourced from water (H₂O).
- Oxygen is also sourced from carbon dioxide and water.

3. **Reviewing the Options**:
- The options provided are:
- Option 1: Carbon, Hydrogen, Oxygen
- Option 2: Sodium, Calcium, Magnesium
- Option 3: Iron, Cobalt, Manganese
- Option 4: Copper, Molybdenum, Nitrogen
- Among these, only the first option contains the non-mineral elements.

4. **Conclusion**:
- Therefore, the correct answer to the question "The non-mineral elements are" is **Carbon, Hydrogen, and Oxygen**.