Question

In the $ABO$ system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be

• A. B
• B. $O$
• C. AB
• D. A

Answer 1

Answer: (C)

Blood group	Antigen on RBC	Antibodies in serum
A	A	anti b
B	B	anti a
AB	A and B	-
O	-	anti a and anti b

Hence, blood group $AB$ has no antibodies in serum.