Elephantiasis/Filariasis is a disease of

Options

A. Temperate areas
B. Tropical areas
C. Subtropical areas
D. Hilly tracts

Answer

### Step-by-Step Solution:

1. **Understanding the Disease**: Elephantiasis, also known as filariasis, is a disease characterized by severe swelling, often in the legs, due to the obstruction of lymphatic vessels. This condition is caused by parasitic worms, primarily transmitted through mosquito bites.

2. **Identifying Affected Areas**: The disease is prevalent in certain geographical regions. It is important to determine where these regions are located to answer the question correctly.

3. **Evaluating Options**:
- **Temperate Areas**: These regions are characterized by moderate climates and are not typically associated with the transmission of filariasis. Therefore, this option is incorrect.
- **Tropical Areas**: These regions, which include parts of South Africa and Southeast Asia, are known for their warm climates and are conducive to the life cycle of the mosquitoes that transmit the disease. This option is likely correct.
- **Subtropical Areas**: Similar to temperate areas, subtropical regions do not have a significant prevalence of filariasis. Thus, this option is also incorrect.
- **Helicobacteria**: This term does not relate to the geographical distribution of diseases like filariasis and is not a valid option.

4. **Conclusion**: Based on the evaluation of the options, the correct answer is that Elephantiasis/Filariasis is primarily a disease of **tropical areas**.

### Final Answer:
Elephantiasis/Filariasis is a disease of **tropical areas**.