Assertion : Bacteria are useful in leather industry and jute industry.
Reason : Bacteria separate jute fibres and perform leather tanning.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Bacteria are useful in the leather industry and jute industry." This means that bacteria play a significant role in the processes involved in these industries.

2. **Evaluating the Reason**: The reason provided is that "Bacteria separate jute fibres and perform leather tanning." This indicates the specific functions that bacteria perform in these industries.

3. **Confirming the Assertion**: Bacteria are indeed used in both the leather and jute industries. In the leather industry, bacteria are involved in the tanning process, which is essential for converting animal hides into leather.

4. **Confirming the Reason**: In the jute industry, bacteria help in separating jute fibers from the plant material. This is typically done by submerging jute plants in water, allowing bacterial action to break down the tissues and free the fibers.

5. **Conclusion**: Both the assertion and the reason are correct. Bacteria are beneficial in both industries, and the reason accurately explains how they contribute to these processes.

### Final Answer:
Both the assertion and the reason are correct, and the reason correctly explains the assertion.

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