Assertion :- In Porifera archaeocytes are totipotent cells
Reason :- They can give rise to all other types of the cells in Poriferans.

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 regarding the assertion and reason about Porifera and archaeocytes, follow these steps:

### Step 1: Understand the Assertion
The assertion states that "In Porifera, archaeocytes are totipotent cells."
- **Explanation**: Totipotent cells are those that have the ability to differentiate into any type of cell. In the context of Porifera (sponges), archaeocytes are indeed totipotent, meaning they can transform into various cell types within the sponge.

### Step 2: Understand the Reason
The reason provided states that "They can give rise to all other types of the cells in Poriferans."
- **Explanation**: This statement is also correct. Archaeocytes can differentiate into different cell types such as pinacocytes, choanocytes, and other specialized cells in sponges.

### Step 3: Evaluate the Relationship Between Assertion and Reason
Now, we need to determine if the reason correctly explains the assertion.
- Since the reason accurately describes the function of archaeocytes as totipotent cells that can give rise to all other cell types in Porifera, it serves as a correct explanation for the assertion.

### Step 4: Conclusion
Both the assertion and the reason are true, and the reason is the correct explanation of the assertion. Therefore, the answer is:
- **Option 1**: Both assertion and reason are true, and reason is the correct explanation of assertion.