Donors and recipients of blood transfusion can be

Options

A. Only father and son
B. Only brother and sister
C. Only maternal uncle and niece
D. All the above

Answer

**Step-by-Step Text Solution:**

1. **Understanding Blood Transfusion:**
- In blood transfusion, a donor is the individual who gives blood, while the recipient is the individual who receives blood.

2. **Compatibility in Blood Transfusion:**
- Blood transfusions require compatibility between donor and recipient blood types to prevent adverse reactions.
- The universal donor blood type is O negative (O-), meaning individuals with this blood type can donate to anyone.
- The universal recipient blood type is AB positive (AB+), meaning individuals with this blood type can receive blood from any donor.

3. **Analyzing the Options:**
- The question provides four options regarding who can be donors and recipients:
- a) Only father and son
- b) Only brother and sister
- c) Only maternal uncle and niece
- d) All of the above

4. **Evaluating Each Option:**
- **Father and Son:** A father can donate blood to his son, assuming compatibility.
- **Brother and Sister:** Siblings can also have compatible blood types, allowing for blood donation.
- **Maternal Uncle and Niece:** An uncle can donate blood to his niece, provided their blood types are compatible.

5. **Conclusion:**
- Since all the relationships mentioned (father-son, brother-sister, maternal uncle-niece) can potentially have compatible blood types for transfusion, the correct answer is:
- **d) All of the above.**