In India, filariasis is transmitted by

Options

A. Culex fatigens
B. Anopheles culicifacies
C. Musca domestica
D. Aedes aegypti

Answer

### Step-by-Step Solution:

1. **Understanding Filariasis**:
- Filariasis is a disease caused by parasitic worms, specifically Wuchereria bancrofti, which affects the lymphatic system. This leads to severe swelling, often referred to as elephantiasis.

2. **Identifying the Vector**:
- The transmission of filariasis occurs through a vector. In this case, the vector responsible for transmitting the disease is a specific type of mosquito.

3. **Evaluating the Options**:
- The question provides several options for potential vectors:
- **Hewlett's pathogens** (likely a typo for "Culex" mosquitoes)
- **Anopheles** (known for transmitting malaria)
- **Culici** (a general term for mosquitoes, but not specific)
- **Musca domestica** (housefly, not a vector for filariasis)
- **Aedes aegypti** (known for transmitting dengue, chikungunya, and yellow fever)

4. **Correct Identification**:
- The correct vector for filariasis in India is the **Culex** mosquito, specifically Culex quinquefasciatus, which is often referred to as Hewlett's mosquito in some contexts.

5. **Conclusion**:
- Therefore, the answer to the question is that filariasis in India is transmitted by **Culex mosquitoes**.

### Final Answer:
In India, filariasis is transmitted by **Culex mosquitoes**.