Which one is not an STD

Options

A. Huntington disease
B. Gonorrhoea
C. AIDS
D. Syphilis

Answer

To determine which option is not a sexually transmitted disease (STD), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of STD**:
- STDs are infections that are primarily transmitted through sexual contact. They include various diseases caused by bacteria, viruses, or parasites.

2. **Analyze the Options**:
- The options provided are:
- A) Huntington disease
- B) Gonorrhea
- C) AIDS
- D) Syphilis

3. **Identify Each Condition**:
- **Huntington disease**: This is a genetic disorder caused by an inherited mutation in the HTT gene. It is not transmitted through sexual contact.
- **Gonorrhea**: This is a bacterial infection caused by Neisseria gonorrhoeae, and it is transmitted through sexual contact.
- **AIDS (Acquired Immunodeficiency Syndrome)**: This is caused by the Human Immunodeficiency Virus (HIV) and is also transmitted through sexual contact.
- **Syphilis**: This is a bacterial infection caused by Treponema pallidum, which is transmitted through sexual contact.

4. **Determine the Correct Answer**:
- Since Huntington disease is inherited and not transmitted sexually, it is not an STD. The other three options (Gonorrhea, AIDS, and Syphilis) are all STDs.

5. **Final Conclusion**:
- The correct answer is **Huntington disease**, as it is not a sexually transmitted disease.