Question

In the following table of human ABO blood groups, fill up the blanks (i), (ii), (iii) and (iv) from the options given below.

Blood group	Antigens on RBCs	Antibody in Plasma	Donor groups
A	A	Anti-B	A, O
B	B	Anti-A	B, O
AB	AB	(ii)	A, B, AB, O
O	(i)	(iii)	(iv)

• A. i - Nil, ii - Nil, iii - Anti-A, B, iv - AB
• B. i - Nil, ii - Nil, iii - Nil, iv - O
• C. i - Nil, ii - Anti-A, B, iii - Nil, iv - O
• D. i - Nil, ii - Nil, iii - Anti-A, B, iv - O

Answer 1

The correct option is D i - Nil, ii - Nil, iii - Anti-A, B, iv - O

i) for O blood group the antigens are absent on the RBCs, III) the plasma therefore contains antibodies for both antigen A and antigen B,

II) for AB blood group the surface of RBC has both antigen A and B, therefore no antibodies in the plasma.

iv) the donor group of O is only O group.

So, the correct answer is 'i - Nil, ii - Nil, iii - Anti-A, B, iv - O'