Question

The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC because 'O' in it refers to having

(a) other antigens besides A and B on RBCs

(b) over dominance of this type on the genes for A and B types

(c) one antibody only-either anti-A or anti-B on the RBCs

(d)  no antigens A and B on RBCs

Answer 1

Correct Option (d)  no antigens A and B on RBCs

Explanation:

Landsteiner divided human population into four groups based on the presence of antigens found in their RBCs. Each group represented a blood group. Thus, there are four types of blood groups A, B, AB and O. Blood group 'O' does not centain any antigen on RBCs, hence can be given to any person, that's why this blood group is called universal donor.