Assertion (A): Organ transplantation patients are given immunosuppressive durgs.
Reason (R): Transplanted tissue has antigens which stimulate the specific immune response of the recipient.

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion (A)**: The assertion states that organ transplantation patients are given immunosuppressive drugs. This is a widely accepted medical practice to prevent the rejection of transplanted organs.

2. **Understanding the Reason (R)**: The reason provided is that transplanted tissue has antigens which stimulate the specific immune response of the recipient. This is true because the immune system recognizes foreign tissues (like transplanted organs) as threats due to the presence of different antigens.

3. **Linking Assertion and Reason**: The assertion and reason are connected. When a patient receives an organ transplant, their immune system may identify the transplanted organ as foreign due to these antigens. This can trigger an immune response that may lead to rejection of the organ.

4. **Role of Immunosuppressive Drugs**: To counteract this potential rejection, doctors prescribe immunosuppressive drugs. These medications suppress the immune response, reducing the likelihood that the recipient's body will attack the transplanted organ.

5. **Conclusion**: Both the assertion and the reason are true. Furthermore, the reason correctly explains why the assertion is true. Therefore, the answer to the question 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.

---