Which disease is caused by a virus ?

Options

A. Gonorrhoea
B. Syphilis
C. Genital warts
D. Trichomoniasis

Answer

To determine which disease is caused by a virus, we will analyze the options provided and identify the causative agents of each disease.

### Step-by-Step Solution:

1. **Identify the Options**: We have four diseases to consider: Gonorrhea, Syphilis, Genital Warts, and Trichomoniasis.

2. **Analyze Gonorrhea**:
- Causative Agent: Gonorrhea is caused by *Neisseria gonorrhoeae*, which is a bacterium.
- Conclusion: Gonorrhea is not caused by a virus.

3. **Analyze Syphilis**:
- Causative Agent: Syphilis is caused by *Treponema pallidum*, which is also a bacterium.
- Conclusion: Syphilis is not caused by a virus.

4. **Analyze Genital Warts**:
- Causative Agent: Genital warts are caused by the Human Papillomavirus (HPV), which is a virus.
- Conclusion: Genital warts are indeed caused by a virus.

5. **Analyze Trichomoniasis**:
- Causative Agent: Trichomoniasis is caused by the protozoan *Trichomonas vaginalis*.
- Conclusion: Trichomoniasis is not caused by a virus.

6. **Final Conclusion**: Among the options provided, the disease caused by a virus is **Genital Warts**.