Assertion : When two semi conductor of p and n type are brought in contact, they form p-n junction which act like a rectifier.
Reason : A rectifier is used to convent alternating current into direct current.

Options

A. Assertion is correct, reason is correct, reason is a correct explanation for assertion.
B. Assertion is correct, reason is correct, reason is not a correct explanation for assertion
C. Assertion is correct, reason is incorrect
D. Assertion is incorrect, reason is correct

Explanation

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

### Step 1: Understand the Assertion
The assertion states that when two semiconductors of p-type and n-type are brought into contact, they form a p-n junction which acts like a rectifier.

- **Explanation**: A p-n junction is formed when p-type semiconductor (which has an abundance of holes) is joined with n-type semiconductor (which has an abundance of electrons). This junction allows current to flow more easily in one direction than the other, which is the fundamental behavior of a rectifier.

### Step 2: Understand the Reason
The reason states that a rectifier is used to convert alternating current (AC) into direct current (DC).

- **Explanation**: Rectifiers are indeed used in circuits to convert AC, which periodically reverses direction, into DC, which flows in a single direction. This is achieved by allowing current to pass through the p-n junction in one direction while blocking it in the opposite direction.

### Step 3: Analyze the Relationship Between Assertion and Reason
Now, we need to determine if the reason correctly explains the assertion.

- While both the assertion and reason are true, the reason does not specifically explain why the p-n junction acts as a rectifier. The assertion describes the behavior of the p-n junction, while the reason describes the function of a rectifier in general.

### Step 4: Conclusion
Based on the analysis:
- The assertion is correct: A p-n junction does act like a rectifier.
- The reason is also correct: Rectifiers convert AC to DC.
- However, the reason does not serve as a correct explanation for the assertion.

Thus, the correct conclusion is that the assertion is true, the reason is true, but the reason is not a correct explanation for the assertion.

### Final Answer
The correct option is: Assertion is correct, Reason is correct, but Reason is not a correct explanation for the Assertion.

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