A blood group has both A and B antigens but no antibodies. Which group is it?

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answer is C.

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Detailed Solution

Concept- In the ABO blood grouping systme, there are four varieties of blood type A. B, AB, this is due to the presence and absence of antigens. There are two types of antigen A and B and two varieties of antibodies present are A and B. The similar antigen and antibody can cause agglutination, for instance, A antigen agglutinates with A antibody. So similar antigen and antibody can not be present in an individual.
Blood group A- The person with blood type A has antibody B within the plasma and antigen A within the RBC.
Blood group B- The person with people B has antibody A within the plasma and antigen B within the RBC.
Blood group AB- The person with people AB has no antibody within the plasma and only antigen A and B are present on RBC surface and therefore, a person with this blood group can accept/recieve blood from any one, so also referred to as ‘unviersal recipient’.
Blood group O- This group has only antibodies A and B but not antigen. Because of absence of antigen this blodd can be transferred/donated to any one, so the individual with this blood group is also referred to as ‘universal donor’.
Hence, the correct answer is 3.

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