Which of the following is a component of bio-gas ?

Options

A. Methane
B. LPG
C. CNG
D. Hydrogen sulphide.

Answer

### Step-by-Step Solution:

1. **Understanding Biogas**:
- Biogas is a renewable energy source produced from the breakdown of organic matter, such as animal dung, food waste, and agricultural residues, through anaerobic digestion (without oxygen).

2. **Identifying Components of Biogas**:
- The main components of biogas include various gases produced during the anaerobic digestion process. The primary gas produced is methane (CH4).

3. **Analyzing the Options**:
- The question provides four options:
- A) Methane
- B) LPG (Liquefied Petroleum Gas)
- C) CNG (Compressed Natural Gas)
- D) Hydrogen Sulphide
- Among these options, we need to identify which one is a component of biogas.

4. **Determining the Correct Answer**:
- Methane (option A) is the major component of biogas, typically comprising about 52-65% of the total gas produced.
- Other components include carbon dioxide (CO2), which makes up about 32-35%, and trace amounts of other gases.
- LPG and CNG are not components of biogas; they are products derived from fossil fuels. Hydrogen sulphide can be present in biogas but is not a primary component.

5. **Conclusion**:
- Based on the analysis, the correct answer to the question "Which of the following is a component of biogas?" is **A) Methane**.