[A] : Senescence occurs in all non meristematic cells.
[B]: Meristems are potentially immortal.

Options

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

Answer

To analyze the statements regarding senescence and meristematic cells, we can break down the question into a step-by-step solution.

### Step 1: Understand the Assertion
The assertion states that "Senescence occurs in all non-meristematic cells."
- **Explanation**: Senescence refers to the process of aging in plants, which typically occurs in cells that are no longer actively dividing. Non-meristematic cells are those that have differentiated and are not capable of further division. Therefore, it is correct to say that senescence occurs in these cells as they age and eventually die.

### Step 2: Understand the Reason
The reason states that "Meristems are potentially immortal."
- **Explanation**: Meristematic cells are undifferentiated cells found in the growing regions of plants. They have the ability to continuously divide and produce new cells. Because of this continuous division, meristematic cells can be considered "potentially immortal" as they do not undergo senescence in the same way that non-meristematic cells do.

### Step 3: Evaluate the Relationship Between Assertion and Reason
Now, we need to determine if the reason provided is a correct explanation of the assertion.
- **Analysis**: The assertion is true because senescence does occur in non-meristematic cells. The reason is also true because meristematic cells can continuously divide, which prevents them from aging like non-meristematic cells. However, the reason does not directly explain the assertion; it provides context but does not clarify why senescence occurs in non-meristematic cells.

### Step 4: Conclusion
Based on the analysis:
- Both the assertion and the reason are true.
- However, the reason is not a correct explanation of the assertion.

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

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