Liver rot of sheep is caused by

Options

A. Fasciola hepatica
B. Planaria
C. Turbellaria
D. Bipalium

Answer

### Step-by-Step Solution:

1. **Identify the Disease**: The question states that we need to identify the cause of "liver rot" in sheep. This condition is known to be associated with liver infections.

2. **Understand the Options**: The options provided are:
- a) Fasciola hepatica
- b) Planaria
- c) Turbellaria
- d) Bipallium

3. **Recognize the Causative Agent**: Liver rot in sheep is specifically caused by a parasite known as the liver fluke. The scientific name of the liver fluke is **Fasciola hepatica**.

4. **Analyze the Other Options**:
- **Planaria**: This is a type of flatworm that is free-living and does not cause liver rot.
- **Turbellaria**: This is a class of flatworms that includes free-living species, not parasitic ones like the liver fluke.
- **Bipallium**: This is also a type of planarian belonging to the class Turbellaria, which is not responsible for liver rot.

5. **Conclusion**: Based on the information, the only option that correctly identifies the cause of liver rot in sheep is **Fasciola hepatica**.

### Final Answer:
The correct answer is **a) Fasciola hepatica**.

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