Assertion:- All eukaryotic cells are not identical.
Reason:- Centrioles are found in animal cells, absent in almost all plant cell.

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 assertion-reason question, we will analyze both the assertion and the reason step by step.

### Step 1: Understand the Assertion
The assertion states that "All eukaryotic cells are not identical." This means that while eukaryotic cells share certain characteristics (such as having a nucleus), they can differ in various aspects such as structure, function, and components.

### Step 2: Understand the Reason
The reason given is that "Centrioles are found in animal cells, absent in almost all plant cells." This statement is true. Centrioles are cylindrical structures involved in cell division and are typically found in animal cells. In contrast, plant cells usually lack centrioles and utilize different mechanisms for cell division.

### Step 3: Analyze the Relationship
Now we need to determine if the reason provided explains the assertion. The presence of centrioles in animal cells and their absence in plant cells is indeed one of the many differences that contribute to the assertion that not all eukaryotic cells are identical. Therefore, the reason does support the assertion.

### Step 4: Conclusion
Both the assertion and the reason are true, and the reason correctly explains the assertion. Thus, the correct answer is option A: both assertion and reason are true, and the reason is the correct explanation of the assertion.

### Final Answer
**Option A: Both assertion and reason are true, and reason is the correct explanation of assertion.**

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