A certain road accident patient with an unknown blood group needs an immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
Blood group B
Blood group AB
Blood group O
Blood group A
Individuals with blood group 'O' are called 'universal donors' because they can donate blood to persons with any other blood group (A, B, AB, or O). In an emergency where the recipient's blood group is unknown, using group O blood prevents severe problems of clumping (destruction of RBCs) that would occur due to antigen-antibody incompatibility .
Join thousands of students and practice with AI-generated mock tests.