In the ABO blood groups, which group has no antibodies present in it and which group has both anitgens present on the RBC surface.

The correct option is B AB and O respectively

Human ABO blood group system is classified on the basis of antigens A and B present on the surface of the red blood cells. For instance, if blood cells have antigen A on their surface, they are called Group A, and this group will have antibodies against the B antigen in its serum fluid. Types of antigen and antibodies present in various groups of the ABO blood group system are as follows:

Blood group	Antigen	Antibody
A	A	anti-B
B	B	anti-A
AB	A, B	--
O	--	anti-A, anti-B

The table makes it evident that the blood group AB has no antibodies in its serum, while the blood group O has no antigens on its RBC surface.