Sexual reproduction is absent in

Options

A. Phycomycetes
B. Ascomycetes
C. Basidiomycetes
D. Deuteromycetes.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which group of fungi does not exhibit sexual reproduction.

2. **Identifying the Options**: The options provided are:
- Icomycetes
- Escomycetes
- Decidomycetes
- Deuteromycetes

3. **Analyzing Each Option**:
- **Icomycetes**: This group includes fungi that can reproduce sexually.
- **Escomycetes**: This group, also known as sac fungi, is known for sexual reproduction.
- **Decidomycetes**: This term seems to be a misnomer; it might refer to a group that typically has sexual reproduction.
- **Deuteromycetes**: This group is known as "fungi imperfecti" and is characterized by the absence of sexual reproduction.

4. **Conclusion**: Based on the analysis, the group that does not have sexual reproduction is **Deuteromycetes**.

5. **Final Answer**: The correct answer is **Deuteromycetes**.