A person with blood group B can only donate blood to individuals with blood groups

A person with blood group B can donate blood to individuals with blood group B and AB. This is because people with blood group B have antigens on the surface of their red blood cells that are recognized by the immune system of individuals with blood group B and AB. These antigens are not present on the red blood cells of people with blood group A or O. However, people with blood group B should not donate blood to individuals with blood group A or O because the immune system of individuals with blood group A or O will recognize the antigens on the surface of the red blood cells as foreign and attack them. This can cause serious complications and even be life-threatening. So, in summary, people with blood group B can donate blood to individuals with blood group B and AB, but not to individuals with blood group A or O.