Question

Detection of blood groups is done by agglutinisation test using antiserum. According to this method, if the blood shows coagulation with

• A. Antiserum B, blood group is AB
• B. Antiserum B, blood group is B
• C. Antiserum A and B, blood group is 0
• D. Antiserum A, blood group is 0

Answer 1

The correct option is B Antiserum B, blood group is B

• Blood A type has only A antigen, blood B type has only B antigen, blood AB type has A antigen as well as B antigen, blood O type has neither A antigen nor B antigen.
• If a person of blood A donates the blood to group B person. This will not be possible, because blood group A contains A antigen and blood group B contain B antigen.
• This may lead to the agglutination reaction. Antiserum B contains B antibodies this will agglutinate that blood group that has B antigen on its surface. As a blood group, B has B antigen on its surface.

So, the correct answer is option B.