Fungi are fillamentous with the exception of X which is unicellular. Identify X.

Options

A. Yeast
B. Albugo
C. Mucor
D. Mucor

Explanation

To solve the question, we need to identify the unicellular fungus among the options provided. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Characteristics of Fungi
- Fungi are primarily filamentous organisms, meaning they are made up of long, thread-like structures called hyphae.
- However, there are exceptions to this rule, specifically unicellular fungi.

### Step 2: Identify the Unicellular Fungus
- The question asks for the exception to the filamentous structure of fungi, which is unicellular.
- The most common example of unicellular fungi is yeast.

### Step 3: Analyze the Options
1. **Yeast**: This is a unicellular fungus known for its sac-like structure. It is the correct answer.
2. **Albugo**: This is a filamentous fungus and is multicellular. Hence, it does not fit the criteria.
3. **Mucor**: This is also a multicellular and filamentous fungus, so it is not the answer.
4. **Another mention of Mucor**: This is redundant and still incorrect as it refers to the same multicellular fungus.

### Step 4: Conclusion
- The only unicellular fungus among the options is yeast. Therefore, X is identified as yeast.

### Final Answer
**X is Yeast.**

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