Cattle dung is commonly used for biogas production because (a) Cattle dung is a rich source of methanogens (b) It has large amount of cellulose as cattle are herbivores (c) It is easily available in large quantities in rural areas

Options

A. (a) & (b)
B. (a) & (c)
C. (b) & (c)
D. (a) (b) & (c)

Answer

To solve the question regarding why cattle dung is commonly used for biogas production, we can analyze each option provided:

1. **Understanding Biogas Production**:
- Biogas primarily consists of methane (CH4), carbon dioxide (CO2), and small amounts of other gases. Methanogens, which are a type of bacteria, play a crucial role in the production of methane from organic matter.

2. **Evaluating Option (a)**:
- "Cattle dung is a rich source of methanogens."
- This statement is true. Cattle dung contains a variety of microorganisms, including methanogens, which are essential for converting organic material into methane during anaerobic digestion.

3. **Evaluating Option (b)**:
- "It has a large amount of cellulose as cattle are herbivores."
- This statement is somewhat misleading in the context of biogas production. While it is true that cattle dung contains cellulose due to the herbivorous diet of cattle, cellulose itself is not directly converted into biogas. Instead, the digestion of cellulose is a process that occurs in the rumen of cattle. Therefore, this option is not directly relevant to the production of biogas.

4. **Evaluating Option (c)**:
- "It is easily available in large quantities in rural areas."
- This statement is also true. Cattle dung is readily available in rural areas where cattle farming is prevalent, making it a practical and abundant resource for biogas production.

5. **Conclusion**:
- Based on the evaluations, options (a) and (c) are correct. Therefore, the best answer is that cattle dung is commonly used for biogas production because it is a rich source of methanogens and is easily available in large quantities in rural areas.

**Final Answer**: The correct options are (a) and (c).

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