The fungi which are used to produce the product which is also the first stable product of TCA cycle belongs to

Options

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

Answer

To solve the question, we need to identify the fungi that are used to produce citric acid, which is the first stable product of the TCA cycle.

### Step-by-Step Solution:

1. **Identify the First Stable Product of TCA Cycle**:
- The first stable product of the TCA cycle is citric acid. This is also known as the citric acid cycle.

2. **Determine the Fungi Used for Citric Acid Production**:
- The fungi that are commonly used for the production of citric acid through fermentation is **Aspergillus niger**.

3. **Classify the Fungi**:
- Aspergillus niger belongs to the group of fungi known as Ascomycetes.

4. **Conclusion**:
- Therefore, the fungi which are used to produce citric acid, the first stable product of the TCA cycle, belongs to the Ascomycetes group.

### Final Answer:
The fungi which are used to produce the product which is also the first stable product of the TCA cycle belongs to **Ascomycetes**.