Choose the correct option regarding to the person having nil antibodies(related to ABO blood group) in plasma ?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) -Blood group AB
The ABO blood group system classifies blood types based on the presence or absence of A and B antigens on red blood cells (RBCs). There are four primary blood types: A, B, AB, and O.
In blood group A, A antigens are found on the RBCs, and blood plasma contains B antibodies. Conversely, blood group B has B antigens on RBCs and A antibodies in the blood plasma. Blood group AB displays both A and B antigens on RBCs and lacks antibodies in the blood plasma. Blood group O has no antigens on RBCs and contains both anti-A and anti-B antibodies in the blood plasma.
ABO grouping is based on the presence or absence of two surface antigens (chemicals that can induce immune response) on the RBCs namely A and B. Similarly, the plasma of different individuals contains two natural antibodies (proteins produced in response to antigens). Persons with ‘AB’ blood group have A, B antigens on their RBCs and nil antibodies in plasma therefore can accept blood from persons with AB as well as the other groups of blood (A, B and O). Therefore, such persons are called ‘universal recipients.
| Blood Group | Antigens on RBCs | Antibodies in Plasma | Donor’s Group |
| A | A | Anti - B | A, O |
| B | B | Anti - A | B, O |
| AB | A, B | nil | A, B, AB, O |
| O | nil | Anti- A, B | O |