Question

When RBCs containing both $A$ and $B$ antigen are mixed with your blood serum, they agglutinate. Hence, your blood group is

• A. $A$
• B. $B$
• C. $AB$
• D. $0$

Answer 1

Answer: (D)

$0$

Agglutination takes place when a foreign or unknown antigen is presented to our cells. So if both A and B antigen agglutinate when mixed with our serum then it means our body has neither A antigen nor B antigen.

hence our blood group will be O.

So the correct answer is 'O'.