How many statement is/are correct regarding flat worms? (a) Cysticercosis in man is caused by ingestion of cysticercus in measly pork (b) Fasciola enter snail's body at miracidium stage and leave it at metacercaria stage. (c) All flat worms are hermaphrodite and they exhibit cross fertilisation. (d) Nervous system in Dugesia has only 1-3 longitudinal nerve cords connected by transverse commissure. (e) Cerebral ganglia is absent

Options

A. Three
B. One
C. Zero
D. Four

Answer

To determine how many statements are correct regarding flatworms, we will evaluate each statement one by one.

### Step-by-Step Solution:

1. **Evaluate Statement (a)**: "Cysticercosis in man is caused by ingestion of cysticercus in measly pork."
- Cysticercosis is indeed caused by the ingestion of the larval cyst (cysticercus) of the tapeworm *Taenia solium*, which is found in infected (measly) pork.
- **Conclusion**: This statement is **correct**.

2. **Evaluate Statement (b)**: "Fasciola enters snail's body at miracidium stage and leaves it at metacercaria stage."
- The liver fluke *Fasciola* does enter the snail host at the miracidium stage and exits at the metacercaria stage.
- **Conclusion**: This statement is **correct**.

3. **Evaluate Statement (c)**: "All flat worms are hermaphrodite and they exhibit cross fertilisation."
- While many flatworms are hermaphrodites (having both male and female reproductive organs), not all flatworms are hermaphroditic. For example, blood flukes are dioecious, meaning they have separate male and female individuals. Additionally, flatworms typically undergo internal fertilization rather than cross-fertilization.
- **Conclusion**: This statement is **incorrect**.

4. **Evaluate Statement (d)**: "Nervous system in Dugesia has only 1-3 longitudinal nerve cords connected by transverse commissure."
- The nervous system of *Dugesia* (planaria) does consist of 1-3 longitudinal nerve cords connected by transverse commissures.
- **Conclusion**: This statement is **correct**.

5. **Evaluate Statement (e)**: "Cerebral ganglia is absent."
- Flatworms, including *Dugesia*, do have cerebral ganglia as part of their nervous system.
- **Conclusion**: This statement is **incorrect**.

### Summary of Correct Statements:
- Correct statements: (a), (b), and (d).
- Incorrect statements: (c) and (e).

### Final Answer:
**There are 3 correct statements regarding flatworms.**

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