Propionic bacteria is an important source of

Options

A. Cobalamin
B. Vitamin C
C. TSH
D. Interferon

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the important source of propionic bacteria. We need to identify what propionic bacteria are known for producing.

2. **Analyzing the Options**: The options given are:
- A) Cobalamin (Vitamin B12)
- B) Vitamin C
- C) TSH (Thyroid Stimulating Hormone)
- D) Interferon

3. **Identifying the Role of Propionic Bacteria**: Propionic bacteria are known for their role in fermentation processes and are particularly recognized for producing certain vitamins.

4. **Evaluating Each Option**:
- **Cobalamin (Vitamin B12)**: This vitamin is produced by propionic bacteria and is essential for various bodily functions, including red blood cell formation and neurological function.
- **Vitamin C**: This vitamin is not produced by propionic bacteria; it is produced by other microorganisms like certain species of Streptomyces and yeast (Saccharomyces cerevisiae).
- **TSH (Thyroid Stimulating Hormone)**: This hormone is not produced by propionic bacteria; it is produced in the human body and can be synthesized using DNA technology.
- **Interferon**: This is a protein produced by virus-infected cells in the immune system and is also synthesized using DNA technology, not by propionic bacteria.

5. **Conclusion**: Based on the analysis, the correct answer is A) Cobalamin (Vitamin B12), as it is the important source produced by propionic bacteria.

**Final Answer**: Propionic bacteria is an important source of Cobalamin (Vitamin B12).

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