Assertion : Primary cells can be recharged but secondary cells cannot be recharged .
Reason : Chemical reactions involve in primary cells are irreversible and in secondary cells are reversible .

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 reason is false .
D. If assertion is false but reason is true .

Explanation

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

### Step 1: Understand the Assertion
The assertion states: "Primary cells can be recharged but secondary cells cannot be recharged."
- This statement is **incorrect**. Primary cells cannot be recharged, while secondary cells can be recharged.

### Step 2: Understand the Reason
The reason states: "Chemical reactions involved in primary cells are irreversible and in secondary cells are reversible."
- This statement is **correct**. Primary cells undergo irreversible chemical reactions, which means once the chemical energy is converted to electrical energy, the original materials cannot be restored. Secondary cells, on the other hand, undergo reversible chemical reactions, allowing them to be recharged.

### Step 3: Conclusion
Since the assertion is false and the reason is true, we can conclude that:
- The assertion is incorrect.
- The reason is correct.

### Final Answer
The correct option is that the assertion is false and the reason is true.

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