Pearl is the secretion of

Options

A. Mouth
B. Mantle
C. Kidney
D. None

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the origin of pearls, specifically which part of a mollusk secretes them.

2. **Identifying the Options**: The options provided are:
- A) Mouth
- B) Mantle
- C) Kidney
- D) None

3. **Understanding Mollusks**: Mollusks are a diverse group of animals that include species like oysters and clams. They can be found in various environments, including marine, freshwater, and terrestrial habitats.

4. **Role of the Mantle**: In mollusks, the mantle is a significant part of their anatomy. It is a layer of tissue that covers the internal organs and is responsible for various functions, including the secretion of substances.

5. **Pearl Formation**: Pearls are formed when foreign particles (like sand or parasites) enter the mollusk's shell. To protect itself from irritation caused by these particles, the mollusk secretes layers of nacre (mother of pearl) around the irritant.

6. **Conclusion**: The secretion of pearls occurs in the mantle of the mollusk. Therefore, the correct answer to the question is:
- **B) Mantle**

**Final Answer**: Pearl is the secretion of the mantle.

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