Question

Ram's blood cells do not agglutinate with addition of either anti-A or anti-B serum. However, serum collected from Ram causes agglutination of RBCs collected from another person.
Based on the given information, blood group of Ram is most likely.

• A. A
• B. B
• C. O
• D. AB

Answer 1

The correct option is C O

Antibodies for the antigens A and B exist in the plasma and these are termed Anti-A and Anti-B. The corresponding antigen and antibody are never found in the same individual since, when mixed, they form antigen - antibody complexes, effectively agglutinating the blood. When blood cells do not agglutinate with addition of either Anti-a and Anti-B serum then the blood group is O.

So the correct answer is 'O'