Question

In necessity $Y$ donates his blood to $X$. The blood group of both are same. Besides this the agglutination of RBCs took place. The possible reason of this would be______________.

• A. Blood groups of both $Rh-ve$
• B. Blood groups of both $Rh+ve$
• C. Blood group of $X$ is $Rh+ve$ and that of $Y$ is $Rh-ve$
• D. Blood group of $X$ is $Rh-ve$ and that of $Y$ is $Rh+ve$

Answer 1

The correct option is D Blood group of $X$ is $Rh-ve$ and that of $Y$ is $Rh+ve$

The correct answer is C.

The agglutination indicates that the blood has reacted with a certain antibody and is therefore not compatible with blood containing that kind of antibody. If the blood does not agglutinate, it indicates that the blood does not have the antigens binding the special antibody in the reagent.