Assertion: Interferons are antiviral proteins
Reason : Interferons are secreted by virus infected cells.

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 but reason is false
D. If both assertion and reason are false.

Explanation

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

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Interferons are antiviral proteins."
- This is true because interferons are indeed proteins that play a crucial role in the immune response against viral infections. They help to inhibit viral replication within host cells and enhance the immune response.

2. **Understanding the Reason**:
- The reason states that "Interferons are secreted by virus-infected cells."
- This statement is also true. When cells become infected with a virus, they produce and release interferons as a response to the infection. These interferons then act on neighboring non-infected cells to prepare them for potential viral invasion.

3. **Evaluating the Relationship**:
- While both the assertion and the reason are true, we need to determine if the reason correctly explains the assertion.
- The assertion explains what interferons are (antiviral proteins), while the reason explains how they are produced (by virus-infected cells). However, the reason does not directly explain why interferons are classified as antiviral proteins. They are considered antiviral proteins because of their function in protecting non-infected cells, not merely because they are secreted by infected cells.

4. **Conclusion**:
- Since both the assertion and the reason are true, but the reason does not correctly explain the assertion, the correct answer is: "Both assertion and reason are true, but reason is not the correct explanation of the assertion."

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