Answer: ANTI- B ANTIBODIES
Explanation: ABO blood group system is the classification of human blood based on the inherited properties of the red blood cell(erythrocytes) which are determined by the presence or absence of the antigen A and B carried on the surface of the red blood cell.
The four(4) main blood groups that are defined by the ABO system are; A, B, AB and O.
BLOOD GROUP A; Has A antigens in the red blood cell with anti- B
antibodies in the plasma.( Which correlates with Tom's)
BLOOD GROUP B; Has B antigens in the red blood cell with anti- A antibodies in the plasma.
BLOOD GROUP AB; Has A antigens and B antigens in the red blood cell and no antibodies in the plasma.
BLOOD GROUP O; Has no antigens but has both anti- A and anti- B antibodies in the plasma.