In ABO Blood Grouping antigen is present on __ and antibody in present on __ ?

Q. In ABO Blood Grouping antigen is present on __ and antibody in present on __ ?

A.            Antigen on Red cells, Antobodies in Serum

B.            Antigen on Serum, Antobodies on Red cells

C.            Both Present on Red cells

D.            Both Present in Serum

Answer: Antigen on Red cells, Antobodies in Serum