A coprophillous fungus is

Options

A. Trichoderma
B. Pilobolus
C. Fusarium
D. Humicola

Answer

### Step-by-Step Solution:

1. **Understanding Coprophilous Fungi**:
- Coprophilous fungi are fungi that specifically grow on animal dung. The term "coprophilous" comes from "copro," meaning dung, and "philous," meaning loving or thriving in.

2. **Identifying the Options**:
- The options provided are:
- Trichoderma
- Pilobulus
- Fusarium
- Humicola

3. **Analyzing Each Option**:
- **Trichoderma**: This is a genus of fungi that primarily live in soil and often form symbiotic relationships with plant roots. It does not grow on dung, so it is not coprophilous.
- **Pilobulus**: This is a specific genus of coprophilous fungi that thrive on animal feces, particularly from grazing animals. This option fits the definition of coprophilous fungi.
- **Fusarium**: This genus includes fungal pathogens, such as those causing Panama disease in bananas. It does not relate to dung, so it is not coprophilous.
- **Humicola**: This genus includes cellulolytic fungi, which break down cellulose and are not specifically associated with dung. Hence, it is also not coprophilous.

4. **Conclusion**:
- Based on the analysis, the correct answer to the question "A coprophilous fungus is" is **Pilobulus** (Option 2).

### Final Answer:
A coprophilous fungus is **Pilobulus**.

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