Free-living Platyhelminthes is

Options

A. Taenia
B. Fasciola
C. Tapeworm
D. Planaria

Answer

To solve the question about free-living Platyhelminthes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Phylum Platyhelminthes**:
- Platyhelminthes is a phylum that includes flatworms. Most members of this phylum are known to be parasitic.

2. **Identify Free-Living Members**:
- While most Platyhelminthes are parasitic, there are some that are free-living. The most notable free-living Platyhelminthes is Planaria.

3. **Analyze the Options**:
- The options provided are:
1. Taenia
2. Fasciola
3. Tapeworm
4. Planaria
- Taenia, Fasciola, and Tapeworm are all parasitic flatworms.

4. **Select the Correct Answer**:
- Since Planaria is the only free-living member of the Platyhelminthes, the correct answer is option 4: Planaria.

### Final Answer:
The free-living Platyhelminthes is **Planaria**.