Thermal bacteria survive in

Options

A. Hot water near `100^(@)`C
B. Hot water near `85^(@)`C
C. Hot sulphur spring near `70^(@)`C
D. All the above.

Answer

**Step-by-Step Solution:**

1. **Understanding Thermal Bacteria**: Thermal bacteria, also known as thermophiles, are microorganisms that thrive in high-temperature environments. They can survive in temperatures ranging from about 60°C to 108°C or even higher.

2. **Identifying the Environments**: The question provides several options where thermal bacteria might survive:
- Hot water near 100°C
- Hot water near 85°C
- Hot sulfur springs near 70°C

3. **Analyzing Each Option**:
- **Hot Water Near 100°C**: This temperature is suitable for thermophiles, as it falls within their survival range.
- **Hot Water Near 85°C**: This temperature is also within the range that thermophiles can tolerate.
- **Hot Sulfur Springs Near 70°C**: This temperature is lower than the previous two but still within the survival range of certain thermophiles.

4. **Conclusion**: Since thermal bacteria can survive in all the mentioned environments (100°C, 85°C, and 70°C), the correct answer is that they can survive in all of the above conditions.

5. **Final Answer**: The correct option is **All of the above**.

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