Causal organism of dengue is

Options

A. Arbovirus
B. Wuchereria
C. Anopheles
D. Culex

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the causal organism of dengue. This means we need to identify what specifically causes the disease dengue.

2. **Identifying the Disease**: Dengue is a mosquito-borne tropical disease. This information is crucial as it indicates that the disease is transmitted through mosquitoes.

3. **Recognizing the Causal Agent**: The causal agent of dengue is a virus known as the dengue virus. It is important to note that the disease is not caused by a bacterium or a fungus, but by a virus.

4. **Identifying the Vector**: The dengue virus is primarily spread by certain species of mosquitoes, particularly the Aedes aegypti mosquito. This mosquito acts as the vector for the virus, meaning it carries and transmits the virus to humans.

5. **Reviewing the Options**: The options provided are:
- A. Erbovirus
- B. Mucuraria
- C. Anopheles
- D. Tulip

6. **Analyzing the Options**:
- **Erbovirus**: This term is used informally to refer to viruses transmitted by arthropod vectors, which includes the dengue virus.
- **Mucuraria**: This does not relate to dengue.
- **Anopheles**: This is a genus of mosquitoes that primarily transmit malaria, not dengue.
- **Tulip**: This is a flowering plant and has no relation to dengue.

7. **Conclusion**: Based on the analysis, the correct answer is **Erbovirus**, as it refers to the category of viruses that includes the dengue virus.

### Final Answer:
The causal organism of dengue is **Erbovirus**.

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