Select the correct option representing the excretory organs present in (i) earthworm, (ii) centipede, (iii) prawn, and (iv) flatworm.

Options

A. `{:("(i)","(ii)","(iii)","(iv)"),("Malpighian tubules","Flame cell","Nephridia","Green glands"):}`
B. `{:("(i)","(ii)","(iii)","(iv)"),("Flame cell","Green gland","Malpighian tubules","Nephridia"):}`
C. `{:("(i)","(ii)","(iii)","(iv)"),("Nephridia","Malpighian tubules","Green gland","Flame cell"):}`
D. `{:("(i)","(ii)","(iii)","(iv)"),("Green gland","Nephridia","Flame cell","Malpighian"):}`

Answer

To solve the question regarding the excretory organs present in earthworm, centipede, prawn, and flatworm, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Excretory Organ of Earthworm:**
- Earthworms belong to the phylum Annelida.
- The excretory organ in earthworms is called **nephridia**.
- Nephridia are tubular structures that help in the removal of waste products from the body.

2. **Identify the Excretory Organ of Centipede:**
- Centipedes are classified under the phylum Arthropoda, specifically as myriapods.
- The excretory organ in centipedes is **Malpighian tubules**.
- These tubules are responsible for excreting nitrogenous wastes and help in osmoregulation.

3. **Identify the Excretory Organ of Prawn:**
- Prawns also belong to the phylum Arthropoda, specifically under the class Crustacea.
- The excretory organ in prawns is known as **green glands** or **antennal glands**.
- These glands function similarly to kidneys in other animals, filtering waste from the blood.

4. **Identify the Excretory Organ of Flatworm:**
- Flatworms are part of the phylum Platyhelminthes.
- The excretory organ in flatworms is called **flame cells**.
- Flame cells are specialized cells that help in the excretion of waste and maintain osmotic balance.

5. **Summarize the Findings:**
- Now, we can summarize the excretory organs for each organism:
- Earthworm: Nephridia
- Centipede: Malpighian tubules
- Prawn: Green glands (antennal glands)
- Flatworm: Flame cells

6. **Select the Correct Option:**
- Based on the above information, we can conclude that the correct option representing the excretory organs present in these organisms is option **3**.

### Final Answer:
The correct option representing the excretory organs present in (i) earthworm, (ii) centipede, (iii) prawn, and (iv) flatworm is option **3**.

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