High `CO_(2)` compensation point is found in

Options

A. `C_(3)` plants
B. `C_(4)` plants
C. `CAM` plants
D. Lichens.

Answer

To determine which type of plants have a high carbon dioxide (CO₂) compensation point, we will analyze the characteristics of different plant types: C₃ plants, C₄ plants, plants with Crassulacean Acid Metabolism (CAM), and lichens.

### Step-by-Step Solution:

1. **Understanding CO₂ Compensation Point**:
- The CO₂ compensation point is the level of carbon dioxide concentration at which the rate of photosynthesis equals the rate of respiration. Above this point, photosynthesis can occur efficiently.

2. **C₃ Plants**:
- C₃ plants use the Calvin cycle for photosynthesis and have a higher CO₂ compensation point. They can continue to photosynthesize effectively in higher concentrations of CO₂. They typically saturate at around 450 microliters of CO₂ per liter of air.

3. **C₄ Plants**:
- C₄ plants have a different pathway for photosynthesis, which allows them to thrive in lower CO₂ concentrations. They are more efficient in hot and dry environments but do not have as high a CO₂ compensation point as C₃ plants.

4. **CAM Plants**:
- Plants with Crassulacean Acid Metabolism (CAM) store CO₂ at night and use it during the day. They are adapted to arid conditions but also do not have a high CO₂ compensation point.

5. **Lichens**:
- Lichens are symbiotic associations between fungi and algae. They do not have a specific CO₂ compensation point like higher plants and are not classified in the same way.

6. **Conclusion**:
- Based on the above analysis, C₃ plants exhibit a high CO₂ compensation point compared to C₄ plants, CAM plants, and lichens. Therefore, the correct answer is **C₃ plants**.

### Final Answer:
High CO₂ compensation point is found in **C₃ plants**.