Just as there are nephridia in earthworm, so are

Options

A. Myotomes in fish
B. Statocysts in prawn
C. Parotid glands in toad
D. Flame cells in liver fluke

Answer

### Step-by-Step Solution:

1. **Understanding Nephridia in Earthworms**:
- Nephridia are excretory organs found in earthworms. They function in osmoregulation and excretion, helping to remove waste products from the body.

2. **Identifying the Options**:
- The question asks for an organ in another organism that functions similarly to nephridia in earthworms. The options provided are myotomes in fish, statocysts in prawn, parotid glands in toad, and flame cells in liver fluke.

3. **Evaluating Myotomes in Fish**:
- Myotomes are muscle segments in fish and are not involved in excretion. Therefore, this option is incorrect.

4. **Evaluating Statocysts in Prawn**:
- Statocysts are sensory organs that help in balance and orientation, not in excretion. Thus, this option is also incorrect.

5. **Evaluating Parotid Glands in Toad**:
- Parotid glands secrete toxins for defense and are not related to excretion or osmoregulation. Hence, this option is incorrect as well.

6. **Evaluating Flame Cells in Liver Fluke**:
- Flame cells are specialized excretory cells found in flatworms (like liver flukes) and function similarly to nephridia in earthworms. They help in osmoregulation and excretion.

7. **Conclusion**:
- Based on the evaluations, the correct answer is that just as there are nephridia in earthworms, there are flame cells in liver fluke, as both are involved in excretion and osmoregulation.

### Final Answer:
Just as there are nephridia in earthworms, so are flame cells in liver fluke.

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