Clitellum of Pheretima is thick girdle that is

Options

A. Non-glandular around 14 - 16 segments
B. Glandular around 14 -16 segments
C. Glandular around 16 - 18 segments
D. Non-glandular around 16 - 18 segments

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question refers to the clitellum of Pheretima, which is a genus of earthworms. Earthworms belong to the phylum Annelida.

2. **Understand the Structure**: The clitellum is a thickened, glandular region of the earthworm's body. It plays a crucial role in reproduction.

3. **Locate the Segments**: The clitellum is specifically found in segments 14 to 16 of the earthworm's body.

4. **Function of the Clitellum**: The glands in the clitellum are responsible for secreting a mucus that helps in the formation of a cocoon for the eggs during the breeding season.

5. **Evaluate the Options**: The options given are:
- Non-glandular around 14th to 16th segments
- Glandular around 14th to 16th segments
- Glandular around 16th to 18th segments
- Non-glandular around 16th to 18th segments

6. **Select the Correct Option**: Based on the information, the clitellum is glandular and located around segments 14 to 16. Therefore, the correct answer is "glandular around 14th to 16th segments".

**Final Answer**: Glandular around 14th to 16th segments.

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