Egg case in earthworms is formed by the secretion of a material which is secreted from

Options

A. Peristomium
B. Prostomium
C. Clitellar region
D. Post-clitellar region

Explanation

To solve the question of where the egg case in earthworms is formed from, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Earthworms**:
- Earthworms have a segmented body, which is a characteristic of annelids. Each segment has specific functions and structures.

2. **Identify the Relevant Segments**:
- The segments of an earthworm can be categorized into three regions: pre-clitellar, clitellar, and post-clitellar.
- The clitellar region is particularly important for reproduction.

3. **Focus on the Clitellar Region**:
- The clitellum is a thickened, glandular section of the body wall that is crucial for reproduction. It is typically found in segments 14, 15, and 16 of the earthworm.

4. **Function of the Clitellum**:
- The clitellum secretes a mucus that forms a cocoon (egg case) during reproduction. After copulation, eggs and sperm are deposited into this cocoon, where fertilization occurs.

5. **Conclusion**:
- Therefore, the egg case in earthworms is formed from the secretion of material from the clitellar region.

### Final Answer:
The egg case in earthworms is formed by the secretion of a material from the **clitellar region**.

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