Which one is related to Cockroach ?
(a) Nephridia
(b) Malpighian tubules
(c) Chloragogen cells
(d) Flame cells

Options

A. Nephridia
B. Malpighian tubules
C. Chloragogen cells
D. Flame cells.

Answer

To determine which structure is related to the cockroach, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Question**: The question asks which structure is related to the cockroach from the given options: (a) Nephridia, (b) Malpighian tubules, (c) Chloragogen cells, and (d) Flame cells.

2. **Analyze Option (a) Nephridia**:
- Nephridia are excretory organs found in annelids (like earthworms).
- Since cockroaches belong to the phylum Arthropoda and not Annelida, this option is not related to cockroaches.

3. **Analyze Option (b) Malpighian tubules**:
- Malpighian tubules are excretory structures found in many arthropods, including cockroaches.
- They play a crucial role in the excretion of waste products in these organisms.
- Therefore, this option is related to cockroaches.

4. **Analyze Option (c) Chloragogen cells**:
- Chloragogen cells are found in annelids and are involved in excretion.
- Since they are not found in cockroaches, this option is also not related.

5. **Analyze Option (d) Flame cells**:
- Flame cells are excretory cells found in flatworms (platyhelminthes).
- They are not associated with cockroaches, making this option incorrect as well.

6. **Conclusion**: After analyzing all the options, the only structure that is related to cockroaches is **(b) Malpighian tubules**.

### Final Answer:
(b) Malpighian tubules