Which of the following is an unicellular sac-fungus

Options

A. Claviceps
B. Penicillium
C. Saccharomyces
D. Neurospora

Answer

To determine which of the following is an unicellular sac fungus, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify which of the given options is an unicellular sac fungus. Sac fungi belong to the phylum Ascomycota and are characterized by the production of spores in a sac-like structure called an ascus.

2. **Review the Options**:
- **Option 1: Claviceps**: This is a genus of fungi known as ergot fungi. It is multicellular and can cause ergotism in humans. Therefore, it is not the correct answer.
- **Option 2: Penicillium**: This is a genus of fungi that is also multicellular. It is known for its role in antibiotic production (penicillin) and is not unicellular.
- **Option 3: Saccharomyces**: This is a genus of fungi that is unicellular. It is commonly known as baker's yeast and belongs to the Ascomycetes class. This is a strong candidate for the correct answer.
- **Option 4: Neurospora**: This is another genus of Ascomycetes fungi, but it is multicellular and primarily used in genetic research.

3. **Identify the Correct Answer**: Based on the analysis, **Saccharomyces** is the only unicellular sac fungus among the options provided.

4. **Conclusion**: The correct answer to the question "Which of the following is an unicellular sac fungus?" is **Saccharomyces**.

### Final Answer:
**Saccharomyces** is the unicellular sac fungus.

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