Psedocoelom occurs in :

Options

A. Ascaris
B. Taenia solium
C. Fasciola hepatica
D. Planaria

Answer

To determine where pseudocoelom occurs, we need to analyze the given options based on their classification in the animal kingdom.

### Step-by-Step Solution:

1. **Understand the Types of Body Cavities**:
- **Coelomates**: Organisms that have a true coelom, which is a body cavity lined by mesoderm.
- **Acoelomates**: Organisms that do not have a body cavity.
- **Pseudocoelomates**: Organisms that have a pseudocoelom, which is a body cavity that is not completely lined by mesoderm; it has scattered pouches of ectoderm and endoderm.

2. **Analyze the Options**:
- **A. Ascaris**: This organism belongs to the phylum Nematoda, which is known for having a pseudocoelom.
- **B. Taenia Solium**: This organism belongs to the phylum Platyhelminthes, which are acoelomates (no body cavity).
- **C. Fasciola Hepatica**: This organism also belongs to the phylum Platyhelminthes and is an acoelomate.
- **D. Planaria**: This organism belongs to the phylum Platyhelminthes as well and is also an acoelomate.

3. **Identify the Correct Answer**:
- Among the options, only **Ascaris** belongs to the pseudocoelomate category. The other options (Taenia Solium, Fasciola Hepatica, and Planaria) are all acoelomates.

### Final Answer:
The correct answer is **A. Ascaris**.

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