The blood group that contains B antigens and anti-A antibodies is which group?

The blood group that contains B antigens and anti-A antibodies is group B. In the ABO blood group system, individuals with blood type B possess B antigens on the surface of their red blood cells and produce anti-A antibodies in their plasma. This means that if type B blood encounters A antigens (from type A or type AB blood), the anti-A antibodies can react against those A antigens, causing a potential transfusion reaction.

In context, blood group A has A antigens and anti-B antibodies, blood group AB has both A and B antigens and no anti-A or anti-B antibodies, and blood group O has neither A nor B antigens but has both anti-A and anti-B antibodies. Hence, the characteristics of group B make it distinct due to the presence of B antigens and the absence of A antigens, leading directly to the conclusion that it is indeed type B blood that fits the description given in the question.