In Prawn, excretion is carried out by

Options

A. (a) Protonephridia
B. (b) Malphigian tubules
C. (c) Mushroom gland
D. (d) Green gland

Answer

### Step-by-Step Solution:

1. **Identify the Organism**: The question is about the excretory system in Prawn, which is a member of the phylum Arthropoda.

2. **Understand the Functions of the Excretory Organ**: In prawns, the excretory organ performs two main functions: excretion of nitrogenous waste and osmoregulation (regulating the balance of water and salts in the body).

3. **Locate the Excretory Organ**: The excretory organs in prawns are located at the base of the antennae.

4. **Identify the Type of Waste**: Prawns are aquatic animals, specifically marine, and they need to excrete nitrogenous waste, which can be toxic if accumulated in the body.

5. **Name the Excretory Organ**: The specific excretory organ responsible for these functions in prawns is called the "green gland."

6. **Compare with Other Options**: The question may provide multiple-choice options. It is important to differentiate the green gland from other excretory organs found in different organisms:
- Protonephridia are found in flatworms.
- Malpighian tubules are found in insects like honeybees.
- Mushroom glands are found in cockroaches.

7. **Conclude the Answer**: Based on the information, the correct answer to the question is that in prawns, excretion is carried out by the green gland.

### Final Answer:
In Prawn, excretion is carried out by the green gland.

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