Multiple choice questions (MCQs)
choose the correct option
Chancroid is a sexually transmitted disease caused by

Options

A. Treponema
B. Haemophilus
C. NSSCH
D. Trichomonas

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the causative agent of Chancroid, which is a sexually transmitted disease (STD).

2. **Identifying the Options**: The options provided are:
- a. Treponema
- b. Haemophilus
- c. Neisseria
- d. Trichomonas

3. **Recalling Information about Chancroid**: Chancroid is known to be an STD characterized by painful ulcers on the genitalia. It is important to recall the specific bacterium that causes this condition.

4. **Analyzing the Options**:
- **Treponema**: This is the bacterium that causes syphilis, not Chancroid.
- **Haemophilus**: This refers to *Haemophilus ducreyi*, which is the correct causative agent for Chancroid.
- **Neisseria**: This is associated with gonorrhea, not Chancroid.
- **Trichomonas**: This is a protozoan that causes trichomoniasis, not Chancroid.

5. **Selecting the Correct Answer**: Based on the analysis, the correct answer is option **b. Haemophilus**.

**Final Answer**: b. Haemophilus

---