Find the odd one out (w.r.t. class) :

Options

A. Albugo
B. Pythium
C. Aspergillus
D. Phytopthora

Answer

To solve the question of finding the odd one out with respect to class among the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Classes of Each Organism**:
- Albugo: Class Oomycetes
- Pythium: Class Oomycetes
- Aspergillus: Class Eurotiomycetes
- Phytophthora: Class Oomycetes

2. **Group the Organisms by Class**:
- Oomycetes: Albugo, Pythium, Phytophthora
- Eurotiomycetes: Aspergillus

3. **Analyze the Classes**:
- Oomycetes are often referred to as "water molds" and are not considered true fungi. They are eukaryotic and can reproduce both sexually and asexually.
- Eurotiomycetes, on the other hand, are true fungi and belong to the kingdom Fungi. They are characterized by sac-like structures (ascomycetes).

4. **Determine the Odd One Out**:
- Since Albugo, Pythium, and Phytophthora all belong to the class Oomycetes, while Aspergillus belongs to the class Eurotiomycetes, Aspergillus is the odd one out.

### Conclusion:
The odd one out with respect to class is **Aspergillus**.