Extraction of waste material from the blood takes place in

Options

A. Funnel-shaped part of nephridium
B. Tubular part of nephridium
C. Nephridiopore
D. Coelomic chamber

Explanation

To answer the question, "Extraction of waste material from the blood takes place in," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: The question pertains to the excretory system of an earthworm. Understanding the organism is crucial for identifying the correct excretory structures.

2. **Understand the Excretory System**: The earthworm's excretory system primarily consists of structures called nephridia. Nephridia are responsible for the removal of waste materials from the body.

3. **Know the Parts of Nephridia**: The nephridia have two main parts:
- **Funnel-shaped part**: This part is responsible for collecting coelomic fluid, which contains waste materials.
- **Tubular part**: This part is responsible for the actual extraction and elimination of waste materials from the blood.

4. **Focus on Waste Extraction**: Since the question specifically asks about the extraction of waste materials from the blood, we need to identify which part of the nephridia is responsible for this function.

5. **Conclusion**: The tubular part of the nephridium is the structure that extracts waste material from the blood of the earthworm. Therefore, the correct answer is the tubular part of the nephridium.

### Final Answer:
The extraction of waste material from the blood takes place in the **tubular part of the nephridium**.

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