One of the following bacterial groups are exploited in biogas production

Options

A. Methanogens
B. Methanotrophs
C. Organotrophs
D. Eubacteria

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which group of bacteria is exploited in biogas production. This requires knowledge of the types of bacteria involved in this process.

2. **Identifying the Options**: The options provided are:
- Methanogens
- Methanotropes
- Organotropes
- U-bacteria

3. **Defining Each Group**:
- **Methanogens**: These are a group of microorganisms that produce methane as a metabolic by-product during anaerobic respiration.
- **Methanotropes**: These bacteria consume methane and are not primarily involved in its production.
- **Organotropes**: These bacteria utilize organic compounds but do not specifically produce methane.
- **U-bacteria**: This term is not commonly used in microbiology and does not refer to a specific group involved in biogas production.

4. **Analyzing the Role of Methanogens**: Methanogens are known for their ability to thrive in anaerobic (absence of oxygen) conditions and produce methane gas. This gas is a key component of biogas, which is used as a renewable energy source.

5. **Conclusion**: Based on the definitions and roles of the bacterial groups, the correct answer is **Methanogens** as they are specifically exploited in biogas production due to their ability to produce methane gas during anaerobic respiration.

6. **Final Answer**: The bacterial group exploited in biogas production is **Methanogens**.

---