Which of the following is a viviparous Aschelminth?

Options

A. Enterobius
B. Wuchereria
C. Dracunculus
D. Ancylostoma

Answer

To determine which of the following is a viviparous Aschelminth, we need to understand the characteristics of Aschelminthes (roundworms) and the reproductive methods of various species within this group.

### Step-by-Step Solution:

1. **Understand the Term "Viviparous":**
- Viviparous organisms give birth to live young rather than laying eggs. This means that the young develop inside the female's body.

2. **Identify Aschelminthes:**
- Aschelminthes, commonly known as roundworms, belong to the phylum Nematoda. They are characterized by their elongated, cylindrical bodies and can be found in various environments.

3. **Review the Options:**
- We need to evaluate the options provided to identify which one is viviparous:
- **Option 1: Enterobius** - This is known to be oviparous, meaning it lays eggs.
- **Option 2: Wuchereria bancrofti** - This is a parasitic roundworm that is known to be viviparous, as it gives birth to live larvae called microfilariae.
- **Option 3: Dracunculus** - The female Dracunculus is viviparous, releasing larvae into the water, but this is not the primary example of a viviparous Aschelminth.
- **Option 4: Ancylostoma** - This is also oviparous, laying eggs.

4. **Determine the Correct Answer:**
- Among the options, **Wuchereria bancrofti** is the correct answer as it is a viviparous Aschelminth that gives birth to live larvae.

### Final Answer:
**Wuchereria bancrofti** is the viviparous Aschelminth.

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