Choose the odd one out. Give a reason for your answer.
Yeast, Rhizopus, Penicillium

Explanation

**Step-by-Step Solution:**

1. **Identify the Organisms:**
- The three organisms given are Yeast, Rhizopus, and Penicillium.

2. **Classify the Organisms:**
- Yeast is a type of fungus that is unicellular.
- Rhizopus is also a fungus, but it is multicellular.
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