Match the following blood groups with the antibodies present in them.
Blood groupAntibodies(1) A(i) a & b(2) B(ii) b(3) AB(iii) a(4) O(iv) nil1 - (ii), 2 - (iii), 3 - (iv), 4 - (i)
A blood group is a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances, present on the surface of red blood cells (RBCs). Compatibility during blood transfusion is determined based on these blood groups.