Question

Which of the following blood groups can easily receive blood from people with A positive blood type?
A. A negative
B. B positive
C. O negative
D. AB positive
E. AB negative

Answer 1

Blood is a fluid that circulates in the body. It functions to deliver nutrients and oxygen to the different parts of the body. Based on the presence of antigens on the surface of the Red Blood Cells or RBC(s), there are different types of blood groups.

Complete answer:
Blood groups are based on the presence or absence of surface antigens on the RBC(s). Antigens can either be carbohydrates or lipids or proteins or glycoproteins. While antigens are present on the surface of RBC(s), antibodies are present in the serum.
The most commonly used blood group system is the ABO system. This system involves two antigens and their associated antibodies A and B. An individual of blood group A has surface antigen A and antibody B in the serum. Similarly, an individual with blood group B has antigen B on the RBC surface and antibody A in the serum. This is to ensure that the antigens do not agglutinate with the corresponding antibody leading to blood coagulation in the body.
There are individuals who do not have either antigen A or B on the surface of their RBC(s) and belong to blood group O. These individuals have both the antibodies in their serum.
There is another type of blood group called the AB blood group. Individuals with this blood group have both the antigens A and B on the surface of RBC(s), while their blood serum does not have any of the antibodies.
Another type of blood group system is the Rh system. Based on the presence or absence of the Rh factor in blood, individuals are Rh positive or Rh negative.
If an individual belongs to blood group A and is Rh positive, the blood type will be A+. On the other hand, if an individual belongs to blood group A and is Rh negative, the blood type will be A-. Based on this principle, B+, B-, AB+, AB-, O+, O- blood types can be found.
The members of the AB blood group can receive blood from all other blood groups since their blood serum does not have any antibody. Thus, AB+ can receive blood from all other positive groups, while AB- can receive blood from all other negative groups.
Therefore, it can be concluded that a person with A-positive blood can donate blood to a person with AB positive blood group, but not to A negative, B positive, O negative or AB negative individuals.

Hence, the correct answer is option (D).

Note: Humans have different blood groups based on presence or absence of surface antigens on RBC(s). Blood transfusion can only take place between compatible blood groups. Compatibility is determined by the presence/absence of antigens and antibodies on the RBC(s) and in the serum respectively. Rh factor also influences the process of blood transfusion.