Name: The microbes which produce- Citric acid, Cyclosporin A, Statins, Gobar Gas.

Answer

To answer the question regarding the microbes that produce citric acid, cyclosporin A, statins, and gobar gas, we will identify each compound and the corresponding microbe step by step.

### Step-by-Step Solution:

1. **Identify the Microbe for Citric Acid**:
- Citric acid is produced by the fungus **Aspergillus niger**. This organism is widely used in the fermentation industry for the production of citric acid.

2. **Identify the Microbe for Cyclosporin A**:
- Cyclosporin A, which is an immunosuppressant drug, is produced by the fungus **Trichoderma polysporum**. This microbe is significant in pharmaceutical applications.

3. **Identify the Microbe for Statins**:
- Statins, which are used to lower blood cholesterol levels, are produced by the microbe **Monascus purpureus**. This is a type of red yeast that has been utilized in traditional medicine and food.

4. **Identify the Microbe for Gobar Gas**:
- Gobar gas, primarily composed of methane, is produced by the bacterium **Methanobacterium**. This microbe plays a crucial role in anaerobic digestion processes.

### Final Answer:
- **Citric Acid**: Aspergillus niger
- **Cyclosporin A**: Trichoderma polysporum
- **Statins**: Monascus purpureus
- **Gobar Gas**: Methanobacterium