Who can donate blood to a person having blood group A?
a) A
b) AB
c) O
d) both A and O
Explanation: A has Antigen A, while O has no antigen
Who can donate blood to a person having blood group B?
a) B
b) AB
c) O
d) both B and O
Who can donate blood to a person having blood group AB?
a) A and B
b) AB
c) O
d) all of these
Who can donate blood to a person having blood group O?
a) A
b) AB
c) O
d) both A and B
Which of the following person is universal donor?
a) having blood group A
b) having blood group AB
c) having blood group B
d) having blood group O
Explanation: O blood group person can donate blood all persons because his/her blood has no antigen for ABO blood group system
Which blood type can be transfused to an individual whose blood type is unknown?
a) O+
b) AB-
c) O-
d) AB+
Explanation: all the antigens are absent in this case
