Assertion : `alpha` - interferon are used in treatment of cancer.
Reason : `alpha` -interferon provokes immune system to identify tumor cells

Options

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but Ris not correct explanation of A
C. A is true but R is false
D. A and R are false

Answer

To solve the assertion and reason question, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
The assertion states that "alpha-interferon are used in treatment of cancer."

- **Explanation**: Alpha-interferons are a group of proteins that are produced by the immune system in response to pathogens and cancerous cells. They are classified as biological response modifiers and are indeed used in the treatment of certain types of cancer, such as melanoma and some leukemias. This statement is true.

### Step 2: Analyze the Reason
The reason states that "alpha-interferon provokes the immune system to identify tumor cells."

- **Explanation**: Alpha-interferons play a crucial role in enhancing the immune response. They help the immune system recognize and attack tumor cells that might otherwise evade detection. By stimulating various immune cells, alpha-interferons increase the ability of the immune system to identify and destroy cancer cells. This statement is also true.

### Step 3: Determine the Relationship
Now, we need to determine if the reason correctly explains the assertion.

- **Explanation**: Since the assertion is true and the reason is true, and the reason provides a correct explanation for why alpha-interferons are used in cancer treatment, we can conclude that both statements are true and the reason is the correct explanation of the assertion.

### Conclusion
Both the assertion and the reason are true, and the reason correctly explains the assertion. Therefore, the answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

### Final Answer
Both assertion and reason are true, and the reason is the correct explanation of the assertion.

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