During biogas production, microorganisms used to bring about the anaerobic digestion is:

Options

A. Pseudomonas
B. Rhizobium
C. Methanococcus
D. Methanobacillus

Explanation

**Step-by-Step Solution:**

1. **Understanding Biogas Production**: Biogas is a renewable energy source primarily composed of methane (CH4), carbon dioxide (CO2), and small amounts of other gases. It is produced through the anaerobic digestion of organic matter.

2. **Identifying the Process**: The process of anaerobic digestion involves the breakdown of organic materials by microorganisms in the absence of oxygen. This process is crucial for the production of biogas.

3. **Role of Microorganisms**: The key microorganisms involved in anaerobic digestion are methanogenic bacteria. These bacteria are responsible for converting organic matter into methane.

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