Suppose 3 slides are kept containing Antigens A, B, Rh. When Blood sample is added A antigen shows Agglutination, B antigen doesn't show agglutination and Rh Antigen ​doesn't show agglutination. So can we infer that the Blood sample is B+ or B- ?

Dear student.

The answer is B(+ve) blood group.

As ​Rh Antigen ​doesn't show agglutination, the answer is ​B(+ve) blood group, if it would have been ​B(-ve) blood group, on reacting with ​Rh Antigen, the blood will treat Rh antigen as foreign body and would have prepared antibodies against it. Hence there should have been agglutination, which is not the case according to your question.

Hope this information will clear your doubts about the topic.
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