which is not a sexually transmitted disease

Options

A. Genital warts
B. Trichomoniasis
C. Chlamydiasis
D. Myasthenia gravis

Answer

To determine which option is not a sexually transmitted disease (STD), we can analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understand the Definition of STDs**:
- Sexually transmitted diseases are infections that are primarily spread through sexual contact. Common examples include HIV/AIDS, genital warts, chlamydia, and trichomoniasis.

2. **Analyze Each Option**:
- **Option 1: Genital Warts**:
- Caused by the human papillomavirus (HPV) and is considered an STD.
- **Option 2: Trichomoniasis**:
- Caused by the protozoan parasite Trichomonas vaginalis and is also classified as an STD.
- **Option 3: Chlamydiasis**:
- Caused by the bacterium Chlamydia trachomatis and is recognized as an STD.
- **Option 4: Myasthenia Gravis**:
- This is an autoimmune disorder that affects the neuromuscular junction and is not transmitted through sexual contact.

3. **Identify the Correct Answer**:
- Since genital warts, trichomoniasis, and chlamydiasis are all sexually transmitted diseases, the only option that does not fit this category is **Myasthenia Gravis**.

4. **Conclusion**:
- The correct answer is **Option 4: Myasthenia Gravis**, as it is not a sexually transmitted disease.