For retting of jute, the fermenting microbe used is

Options

A. Helicobacter pylori
B. Methophilic bacteria
C. Streptococcus lactin
D. Butyric acid bacteria

Answer

To answer the question "For retting of jute, the fermenting microbe used is," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Process of Retting**:
- Retting is a process used to separate fibers from the plant material, particularly in plants like jute. It involves soaking the plant material in water to allow microbial action to break down the pectin that binds the fibers together.

2. **Identifying the Role of Microbes**:
- Microorganisms play a crucial role in the retting process by decomposing pectin, which is a polysaccharide found in the cell walls of plants. This decomposition allows the fibers to be easily separated from the plant material.

3. **Evaluating the Options**:
- The options provided are:
- A) Helicobacter pylori
- B) Methophilic bacteria
- C) Streptococcus lactis
- D) Butyric acid bacteria
- We need to determine which of these options is involved in the retting of jute.

4. **Analyzing Each Option**:
- **Helicobacter pylori**: This bacterium is known for causing stomach ulcers and is not involved in the retting process.
- **Methophilic bacteria**: These bacteria thrive at moderate temperatures but are not specifically used for retting jute.
- **Streptococcus lactis**: This bacterium is primarily used in the dairy industry for cheese and milk production, not for retting.
- **Butyric acid bacteria**: These are anaerobic bacteria, specifically from the Clostridium genus, which are known to be effective in the retting process by decomposing pectin.

5. **Conclusion**:
- Based on the analysis, the correct answer is **D) Butyric acid bacteria**. These bacteria, particularly species from the Clostridium genus, are essential for the retting of jute fibers.

### Final Answer:
For retting of jute, the fermenting microbe used is **Butyric acid bacteria**.