Excretory organs in Ascaris are

Options

A. Nephridia
B. Kidneys
C. Flame cells .
D. None of these

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about the excretory organs in Ascaris, which is commonly known as the roundworm.

2. **Understand the Classification**: Ascaris belongs to the phylum Nematoda (roundworms). It is important to know the classification to understand the type of excretory structures present.

3. **Know the Excretory Structures**: The excretory organs in Ascaris are not nephridia (which are found in annelids like earthworms). Instead, Ascaris has specialized cells known as "renit cells" or "renette cells."

4. **Differentiate Between Excretory Structures**:
- Nephridia are excretory structures found in annelids.
- Flame cells are found in flatworms (Platyhelminthes).
- Kidneys are the excretory organs in vertebrates.
- Renette cells are specific to nematodes like Ascaris.

5. **Conclusion**: Therefore, the correct answer to the question is that the excretory organs in Ascaris are renette cells.

**Final Answer**: The excretory organs in Ascaris are renette cells.

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