In which of the following sets of blood groups, blood transfusion is possible?

a) A and O (A donor)
b) B and A (B donor)
c) A and AB (A donor)
d) AB and O (AB donor)

Ans- c

Explanation– Blood group O is universal donor and AB is a universal recipient. Being a universal donor, Blood group O can donate blood to all other groups and being a universal recipient blood group AB can accept blood from all other groups.

Thus in all the options, c is the one in which transfusion is possible as AB will receive and A will donate