Dengue fever' is caused by

Options

A. Bacteria
B. Plasmodium
C. Virus
D. Entamoeba histolytica

Answer

**Step-by-Step Solution:**

1. **Understanding Dengue Fever:**
- Dengue fever is a viral illness that is transmitted to humans through the bite of infected mosquitoes, primarily the Aedes aegypti mosquito.

2. **Identifying the Causative Agent:**
- The specific virus responsible for causing dengue fever is known as the dengue virus, abbreviated as DENV.

3. **Analyzing the Options:**
- The question provides four options:
- (a) Bacteria
- (b) Plasmodium
- (c) Virus
- (d) Entamoeba histolytica

4. **Evaluating Each Option:**
- **Option (a) Bacteria:** Bacterial diseases include typhoid and tuberculosis, which are not related to dengue.
- **Option (b) Plasmodium:** This is a genus of parasites that causes malaria, not dengue fever.
- **Option (c) Virus:** This option is relevant as dengue fever is indeed caused by a virus.
- **Option (d) Entamoeba histolytica:** This organism causes amoebic dysentery, which is unrelated to dengue.

5. **Conclusion:**
- Based on the evaluation, the correct answer to the question "Dengue fever is caused by" is **(c) Virus**.