How many animals in the list given below are triploblastic, bilaterally symmetrical and pseudocoelomate?
Ascaris, facsiola, Ancylostoma, Taenia, Neries, Wuchereria,
Pheretima

Options

A. Two
B. Three
C. Four
D. Five

Answer

To solve the question of how many animals from the given list are triploblastic, bilaterally symmetrical, and pseudocoelomate, we will analyze each organism based on the characteristics mentioned.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Triploblastic**: Animals that develop from three germ layers: ectoderm, mesoderm, and endoderm.
- **Bilaterally Symmetrical**: Animals that can be divided into two equal halves along one plane.
- **Pseudocoelomate**: Animals that have a body cavity (coelom) that is not completely lined by mesoderm; the mesoderm is present in patches.

2. **List of Organisms**:
- Ascaris
- Fasciola
- Ancylostoma
- Taenia
- Nereis
- Wuchereria
- Pheretima

3. **Analyzing Each Organism**:
- **Ascaris**:
- Triploblastic: Yes
- Bilaterally symmetrical: Yes
- Pseudocoelomate: Yes
- **Fasciola**:
- Triploblastic: Yes
- Bilaterally symmetrical: Yes
- Pseudocoelomate: No (it is acoelomate)
- **Ancylostoma**:
- Triploblastic: Yes
- Bilaterally symmetrical: Yes
- Pseudocoelomate: Yes
- **Taenia**:
- Triploblastic: Yes
- Bilaterally symmetrical: Yes
- Pseudocoelomate: No (it is acoelomate)
- **Nereis**:
- Triploblastic: Yes
- Bilaterally symmetrical: Yes
- Pseudocoelomate: No (it is coelomate)
- **Wuchereria**:
- Triploblastic: Yes
- Bilaterally symmetrical: Yes
- Pseudocoelomate: Yes
- **Pheretima**:
- Triploblastic: Yes
- Bilaterally symmetrical: Yes
- Pseudocoelomate: No (it is coelomate)

4. **Counting the Pseudocoelomate Animals**:
- Ascaris: Yes
- Ancylostoma: Yes
- Wuchereria: Yes
- Total = 3

### Final Answer:
The number of animals in the list that are triploblastic, bilaterally symmetrical, and pseudocoelomate is **3**.