Free living nematode is

Options

A. Microfilariae
B. Rhabditis
C. Rhabditiform
D. Dracunculus

Answer

To determine which of the given options is a free-living nematode, we will analyze each option step by step.

### Step 1: Understand the term "free-living nematode"
- Free-living nematodes are organisms that do not depend on a host for survival. They can live independently in various environments, such as soil or decaying organic matter.

### Step 2: Analyze the options
1. **Microfilary**
- Microfilary is the larval stage of certain nematodes and is parasitic. It lives within the host's body, making it dependent on the host for survival.
- **Conclusion**: Not a free-living nematode.

2. **Reptitis**
- Reptitis is identified as a free-living nematode. It is saprophytic, meaning it feeds on dead and decaying organic matter. This characteristic indicates that it does not rely on a host for sustenance.
- **Conclusion**: This is a free-living nematode.

3. **Reptiform**
- Reptiform is also a larval stage of certain nematodes and is parasitic. Similar to Microfilary, it lives within the host's body.
- **Conclusion**: Not a free-living nematode.

4. **Draconculus (Guinea Worm)**
- Draconculus, commonly known as Guinea Worm, is a parasitic nematode that lives in the host's body. It is known for causing disease in humans.
- **Conclusion**: Not a free-living nematode.

### Step 3: Identify the correct answer
- Based on the analysis, the only option that qualifies as a free-living nematode is **Reptitis**.

### Final Answer
The free-living nematode is **Reptitis** (Option B).

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