Assertion`:-` Lactic acid bacteria are useful for human.
Reason :- Lactobacillus can perform retting.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False

Explanation

To solve the assertion and reason question, we will analyze both statements step by step.

### Step 1: Evaluate the Assertion
**Assertion:** Lactic acid bacteria are useful for humans.

- **Explanation:** Lactic acid bacteria (LAB), which include genera such as Lactobacillus, are indeed beneficial for human health. They are commonly found in fermented foods like yogurt and are known to promote gut health, enhance digestion, and boost the immune system. Therefore, this assertion is **true**.

### Step 2: Evaluate the Reason
**Reason:** Lactobacillus can perform retting.

- **Explanation:** Retting is a process that involves the use of microorganisms to break down the pectin and other substances in plant materials, facilitating the separation of fibers from the stem. While some bacteria are involved in this process, such as Achromobacter and Clostridium species, Lactobacillus is not one of them. Therefore, this reason is **false**.

### Step 3: Conclusion
- Since the assertion is true and the reason is false, we conclude that the correct answer is that the assertion is true but the reason is false.

### Final Answer:
- The correct option is: **Assertion is true, Reason is false.**

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