Assertion : Light emitting diode (LED) emits spontaneous radiation.
Reason : LED are forward biased p-n junctions.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion , then mark (1)
B. if both Assertion & Reason are true but the reason is not the correct explanation of the assertion ,then mark (2)
C. If Assertion is true statement but reason is false, then mark (3).
D. If both Assertion and reason are false statements, then mark (4)

Answer

To analyze the assertion and reason provided in the question, we will break it down step by step:

### Step 1: Understanding the Assertion
The assertion states that "Light Emitting Diode (LED) emits spontaneous radiation."
- **Explanation**: A Light Emitting Diode (LED) is a semiconductor device that emits light when an electric current passes through it. The light is produced due to the recombination of electrons and holes in the semiconductor material.

### Step 2: Understanding the Reason
The reason states that "LEDs are forward biased p-n junctions."
- **Explanation**: In a p-n junction, when it is forward biased, the p-type material (which has an abundance of holes) and the n-type material (which has an abundance of electrons) allow current to flow. This forward bias reduces the potential barrier, allowing electrons to recombine with holes, which releases energy in the form of light.

### Step 3: Linking Assertion and Reason
Now, we need to determine if the reason correctly explains the assertion.
- **Analysis**: Since the assertion is about the emission of light (spontaneous radiation) and the reason explains that this occurs due to the forward biasing of the p-n junction, we can conclude that the reason supports the assertion.

### Step 4: Conclusion
Both the assertion and the reason are correct, and the reason provides a valid explanation for the assertion. Therefore, we can conclude that:
- **Final Answer**: Both the assertion and reason are correct, and the reason explains the assertion.