question_answer 27)

  Which of the following statements is incorrect' (a)A person of ?O? blood group has anti ?A? and anti -B- antibodies in his blood  plasma. (b) A person of ?B' blood group can't donate blood to a person of ?A? blood group. (c)Blood group is designated on the basis of the presence of antibodies in the blood plasma. (d) A person of AB blood group is universal recipient.

Answer:

                  (c) ABO blood grouping in human is based on the presence or absence of two surface antigens on the RBCs namely A and B. Similarly, the plasma of different individuals contain two natural antibodies. This distribution of antigens and antibodies in the four groups of blood A, B, AB and O are as follows Blood Groups and Donors Compatibility

Blood Group	Antigens on RBCs	Antibodies in Plasma	Donor?s Group
A B AB O	A B A,B Nil	Anti-B Anti-A Nil Anti-A,B	A,O B,O AB,A,B,O O

Thus, blood group in universal donor 4 blood group AB in universal recipient and the other options are correct.