Assertion: Saliva in mouth is psysiological barriers.
Reason: Interferon are cytokine barrier.

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

Answer

To analyze the given assertion and reason, we will break down the information step by step.

### Step 1: Understanding the Assertion
- **Assertion**: "Saliva in the mouth is a physiological barrier."
- **Explanation**: Saliva plays a crucial role in the immune system as it contains enzymes and antimicrobial substances that help in preventing infections. It acts as a barrier by maintaining oral hygiene and neutralizing harmful pathogens.

### Step 2: Understanding the Reason
- **Reason**: "Interferons are cytokine barriers."
- **Explanation**: Interferons are proteins produced by cells in response to viral infections. They play a significant role in the immune response by inhibiting viral replication and activating immune cells. They are classified as cytokines, which are signaling molecules in the immune system.

### Step 3: Evaluating the Assertion and Reason
- **Correctness of Assertion**: The assertion is correct because saliva does function as a physiological barrier in the mouth.
- **Correctness of Reason**: The reason is also correct, as interferons are indeed cytokines that help in the immune response.

### Step 4: Relationship Between Assertion and Reason
- The assertion and reason are both true, but the reason does not directly explain the assertion. The assertion pertains specifically to saliva as a barrier, while the reason discusses interferons, which are related to a different aspect of the immune response.

### Conclusion
- Both the assertion and reason are true, but the reason does not provide a correct justification for the assertion. Therefore, the correct answer is that both are true, but the reason is not the correct explanation of the assertion.

### Final Answer
- **Assertion is true. Reason is true, but it does not justify the assertion.**

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