Assertion: Platyhelminthes are generally hermaphrodites.
Reason: In Platyhelminthes, fertilisation is internal.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Platyhelminthes are generally hermaphrodites."
- Hermaphrodites are organisms that possess both male and female reproductive organs. In the case of Platyhelminthes (flatworms), they do have both types of reproductive organs within the same individual. Therefore, this assertion is **true**.

2. **Understanding the Reason**:
- The reason states that "In Platyhelminthes, fertilization is internal."
- Internal fertilization means that the fertilization of the egg by the sperm occurs inside the female's body. This is also true for many species within the Platyhelminthes group.

3. **Evaluating the Relationship**:
- Now we need to determine if the reason is the correct explanation for the assertion.
- While both statements are true, the reason (internal fertilization) does not explain why Platyhelminthes are hermaphrodites. The presence of both male and female organs is the reason for being hermaphroditic, not the method of fertilization.

4. **Conclusion**:
- Both the assertion and the reason are true, but the reason is not the correct explanation of the assertion. Therefore, the final answer is that both statements are true, but the reason does not correctly explain the assertion.

### Final Answer:
Both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.

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