Use of liches and Nerium in case of pollution is

Options

A. tratment of polluted water
B. promate Pollution due to `SO_(2)`
C. bioindicators of `SO_(2)` Pollution
D. green muffler

Answer

### Step-by-Step Solution:

1. **Introduction to Lichens and Nerium**:
- Lichens are a symbiotic association between fungi and algae. They are sensitive to air quality and can indicate pollution levels.
- Nerium, commonly known as oleander, is a shrub that is also sensitive to air pollutants, particularly sulfur dioxide.

2. **Role of Lichens in Pollution Monitoring**:
- Lichens absorb nutrients from the atmosphere rather than the soil.
- They are particularly sensitive to sulfur dioxide (SO2) pollution. When the concentration of SO2 in the air increases, lichens begin to decline in population.

3. **Impact of Sulfur Dioxide on Lichens**:
- The presence of high levels of sulfur dioxide can lead to the degradation of lichens. Their disappearance from an area indicates an increase in sulfur dioxide levels in the environment.

4. **Role of Nerium in Pollution Monitoring**:
- Similar to lichens, Nerium is also sensitive to sulfur dioxide. Its health and presence in an area can indicate air quality.
- The decline of Nerium populations can also signal increased pollution levels, particularly from sulfur dioxide.

5. **Conclusion**:
- Both lichens and Nerium serve as bioindicators of sulfur dioxide pollution. Their presence or absence can help assess the air quality and the level of pollution in a given area.