Assertion :- Poriferans shows internal fertilization with metamorphic development.
Reason :- Larval form of sponges are similar to their adult.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

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

### Step 1: Understand the Assertion
The assertion states that "Poriferans show internal fertilization with metamorphic development."
- **Explanation**: Poriferans, commonly known as sponges, do exhibit internal fertilization. However, their development is not truly metamorphic in the sense that it involves a complete transformation from larval to adult forms. Instead, sponges have a larval stage that is quite different from the adult form.

### Step 2: Understand the Reason
The reason states that "Larval form of sponges are similar to their adult."
- **Explanation**: This statement is incorrect. The larval forms of sponges (such as the parenchymella) are free-swimming and quite different from the adult sponges, which are sessile (attached to a substrate). The larval stage does not resemble the adult form closely.

### Step 3: Evaluate the Relationship Between Assertion and Reason
- Since the assertion is true (sponges do show internal fertilization), but the reason is false (larval forms are not similar to adults), we can conclude that the correct relationship is that the assertion is true while the reason is false.

### Conclusion
- The correct answer to the question is: **Assertion is true and reason is false.**