A few organism are known to grow and multiply at temperature of `100-105^(@) C`. They belong to

Options

A. Marine archaebacteria
B. thermophilic sulphur bacteria
C. hot-spring blue-green algae (cyanobacteria)
D. thermophilic, subaerial fungi

Explanation

To solve the question regarding which organisms can grow and multiply at temperatures of 100-105°C, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Temperature Range**: The question specifies a temperature range of 100-105°C. This is significantly higher than the temperatures most organisms can tolerate.

2. **Identifying the Types of Organisms**: The options provided include:
- Marine bacteria
- Thermophilic sulfur bacteria
- Hot spring blue-green algae
- Hausseiner bacteria
- Thermophilic sub-aerial fungus

3. **Analyzing Each Option**:
- **Marine Bacteria**: Typically found in ocean environments, they do not thrive at such high temperatures.
- **Thermophilic Sulfur Bacteria**: These are known to thrive in extremely hot environments, such as hot springs, and can tolerate high temperatures, including the range given in the question.
- **Hot Spring Blue-Green Algae**: While some blue-green algae can survive in hot environments, they generally do not thrive at temperatures as high as 100-105°C.
- **Hausseiner Bacteria**: There is limited information on this type, but they are not commonly associated with extreme temperatures.
- **Thermophilic Sub-Aerial Fungus**: Fungi typically do not thrive at such high temperatures.

4. **Conclusion**: Based on the analysis, the organisms that can grow and multiply at temperatures of 100-105°C are the **thermophilic sulfur bacteria**. These bacteria are adapted to extreme heat and utilize sulfur for their metabolic processes.

### Final Answer:
The organisms that grow and multiply at temperatures of 100-105°C belong to **thermophilic sulfur bacteria**.

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