Clitellar segments in earthworm are

Options

A. `13-17`
B. `14-16`
C. `15-19`
D. `14-18`

Answer

### Step-by-Step Solution:

1. **Understanding Earthworm Anatomy**: The earthworm is a member of the phylum Annelida, characterized by a segmented body structure known as metamerism. Each segment is called a metamere.

2. **Identifying the Clitellum**: The clitellum is a specific structure found in earthworms, which is a glandular tissue that plays a crucial role in reproduction. It is located on segments 14 to 16 of the earthworm.

3. **Function of the Clitellum**: The primary function of the clitellum is to secrete a cocoon in which fertilized eggs are deposited. This cocoon protects the developing embryos.

4. **Segment Classification**: The segments of the earthworm can be classified into three categories:
- **Pre-clitellar segments**: These are the segments located before the clitellum.
- **Clitellar segments**: These are the segments that contain the clitellum itself, specifically segments 14 to 16.
- **Post-clitellar segments**: These are the segments located after the clitellum.

5. **Conclusion**: Given the information, the clitellar segments in earthworms are specifically segments 14 to 16.

### Final Answer:
The clitellar segments in earthworms are segments 14 to 16.