A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
- ABlood group A
- BBlood group B
- CBlood group AB
- DBlood group O
Solution & Step-by-step Explanation
Blood group O individuals are called universal donors because their red blood cells lack both Antigen A and Antigen B. Therefore, their blood can be safely transfused to a person of any blood group (A, B, AB, or O) without causing an immediate immunological reaction.