Which organ in earthworm is analogous to kidney of man ?

Options

A. Nephridium
B. Testis
C. Clitellum
D. Intestine

Answer

To answer the question "Which organ in earthworm is analogous to kidney of man?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for an organ in the earthworm that serves a function similar to that of the kidney in humans.

2. **Identifying the Function of the Kidney**: In humans, the kidneys are responsible for the excretion of waste products and the regulation of water and electrolyte balance in the body.

3. **Examining Earthworm Anatomy**: The earthworm has a specialized excretory system that is crucial for its survival.

4. **Identifying the Excretory Organ in Earthworms**: The primary excretory structures in earthworms are called nephridia.

5. **Describing Nephridia**: Nephridia are small, coiled tubes that are glandular and have a rich supply of blood vessels. They perform the function of excretion in earthworms, similar to how kidneys function in humans.

6. **Conclusion**: Therefore, the organ in the earthworm that is analogous to the kidney in humans is the nephridium.

### Final Answer:
The organ in earthworm that is analogous to the kidney of man is the **nephridium**.

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