Filariasis is caused by

Options

A. Taenia solium
B. Fasciola hepatica
C. Ascaris lumbricoides
D. Wuchereria bancrofti

Answer

**Step-by-Step Solution:**

1. **Understanding Filariasis**: Filariasis is an infectious disease that primarily affects tropical and subtropical regions. It is caused by parasitic worms.

2. **Identifying the Causative Agent**: The question asks for the specific organism that causes Filariasis. The options provided are:
- Tinea solium
- Fasciola hepatica
- Ascaris lumbricoides
- Wuchereria bancrofti

3. **Analyzing Each Option**:
- **Tinea solium**: This is a tapeworm that causes a different infection known as taeniasis.
- **Fasciola hepatica**: This is known as the liver fluke and causes fascioliasis, not Filariasis.
- **Ascaris lumbricoides**: This is a roundworm that causes ascariasis, which is an intestinal infection.
- **Wuchereria bancrofti**: This is a parasitic roundworm specifically known to cause Filariasis.

4. **Conclusion**: Based on the analysis, the correct answer is **Wuchereria bancrofti** (option D), as it is the organism responsible for causing Filariasis.

**Final Answer**: Filariasis is caused by **Wuchereria bancrofti**.

---