Question

The most popularly known blood grouping is ABO. It is named ABO and not ABC, because ‘O’ in it refers to

• A. No antigens A and B on the surface of RBCs
• B. Antigens A and B are present inside RBCs
• C. Over dominance of antigen O on A and B
• D. Only antigen B on the RBCs

Answer 1

The correct option is A No antigens A and B on the surface of RBCs

ABO blood grouping is based on the presence or absence of antigen A and B on the surface of RBCs, if both the antigens are absent from the surface of RBCs it forms the ‘O' blood group. The name 'O' comes from the German word “ohne" which means 'without'.