Given below are assertion and reason.
Assertion : Yeasts are unicellular fungi that are used in bakery and brewery industries
Reason : Potato spindle tuber disease is caused by viroids.

Options

A. Point out if both are true with reason being correct explanation
B. both true but reason is nut correct explanation
C. assertion true but reason is wrong
D. both are wrong

Answer

To analyze the assertion and reason provided in the question, we will evaluate each statement separately and then determine their relationship.

### Step 1: Evaluate the Assertion
The assertion states: "Yeasts are unicellular fungi that are used in bakery and brewery industries."

- **Explanation**: Yeasts are indeed unicellular fungi, and they play a crucial role in various industries, particularly in baking and brewing. The most commonly used yeast in these industries is *Saccharomyces cerevisiae*, which ferments sugars to produce carbon dioxide and alcohol. This fermentation process is essential for bread rising and alcohol production.

**Conclusion**: The assertion is **true**.

### Step 2: Evaluate the Reason
The reason states: "Potato spindle tuber disease is caused by viroids."

- **Explanation**: Potato spindle tuber disease is indeed caused by viroids, which are small infectious agents composed of a short strand of circular RNA without a protein coat. This disease affects potato plants, causing stunted growth and spindle-shaped tubers.

**Conclusion**: The reason is also **true**.

### Step 3: Determine the Relationship Between Assertion and Reason
Now, we need to assess whether the reason provides a correct explanation for the assertion.

- The assertion discusses the role of yeasts in the bakery and brewery industries, while the reason discusses a plant disease caused by viroids. There is no direct relationship between the two statements; they pertain to different subjects (fungi in industry vs. plant pathology).

**Conclusion**: Both the assertion and reason are true, but the reason does not explain the assertion.

### Final Conclusion
- Both the assertion and reason are true, but the reason is not a correct explanation for the assertion.

### Answer
- The correct answer is: **Both assertion and reason are true, but reason is not the correct explanation for assertion.**

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