which of the following act as intermediate hosts for liver fluke ?

Options

A. Limnea planorbis
B. Pila and limnea
C. Limax and Helix
D. Limax and onchidium

Answer

To determine which organism acts as the intermediate host for the liver fluke (Fasciola), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Organism**: The liver fluke is scientifically known as Fasciola. It is a parasitic flatworm that causes a disease called fascioliasis.

2. **Identify the Life Cycle**: The life cycle of the liver fluke involves several stages, including eggs, larval forms, and the adult fluke. Understanding this cycle is crucial to identifying the intermediate host.

3. **Recognize the Role of Intermediate Hosts**: Intermediate hosts are organisms that harbor the larval or juvenile stages of a parasite. In the case of Fasciola, the intermediate host is where the fluke develops before it can infect the definitive host (humans).

4. **Locate the Intermediate Host**: According to the information provided, the snail species Limnia (also referred to as Lymnaea) acts as the intermediate host. The embryonated eggs of the liver fluke are released into the water, where they are consumed by the Limnia snail.

5. **Understand the Process**: Once the Limnia snail ingests the embryonated eggs, the eggs develop into larval stages within the snail. These larval forms are then released back into the water, where they can be ingested by the definitive host (humans) through contaminated water or food.

6. **Conclusion**: Based on the life cycle of the liver fluke and the role of the Limnia snail, we conclude that the Limnia snail is the correct answer as the intermediate host for the liver fluke.

### Final Answer:
The Limnia snail acts as the intermediate host for the liver fluke (Fasciola).

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