Cercaria stage of Fasciola heptica leads to

Options

A. sporocyst
B. Redia
C. miracidium
D. metacercaria

Answer

To answer the question "Cercaria stage of Fasciola hepatica leads to", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Organism**:
- Fasciola hepatica is a parasitic flatworm belonging to the phylum Platyhelminthes. It is commonly known as the liver fluke and primarily affects the liver of its host.

2. **Identify the Cercaria Stage**:
- The cercaria is a larval stage of Fasciola hepatica that emerges from the snail host. This stage is characterized by a tailed larva, which is motile and can swim in water.

3. **Cercaria to Metacercaria Transition**:
- After the cercaria stage, the larvae will encyst on aquatic vegetation or other surfaces to become metacercaria. This encysted form is crucial for the lifecycle of the parasite.

4. **Infective Stage**:
- The metacercaria is the infective stage for the primary host, which is typically a mammal such as sheep or cattle. When these animals consume the metacercaria, the larvae can then develop into adult flukes in the liver.

5. **Conclusion**:
- Therefore, the cercaria stage of Fasciola hepatica leads to the metacercaria stage, which is the infective form for the primary host.

### Final Answer:
Cercaria stage of Fasciola hepatica leads to the metacercaria stage.