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 $R{h}^{-ve}$
• B. Blood groups of both $R{h}^{+ve}$
• C. Blood group of X is $R{h}^{+ve}$ and that of Y is $R{h}^{-ve}$
• D. Blood group of X is $R{h}^{-ve}$ and that of Y is $R{h}^{+ve}$

Answer 1

Answer: (D)

Blood group of X is $R{h}^{-ve}$ and that of Y is $R{h}^{+ve}$

A person with Rh- blood does not have Rh antibodies naturally in the blood plasma. But a person with Rh- blood can develop anti-Rh antibodies in the blood plasma if he or she receives blood from a person with Rh+ blood. The Rh antigens in Rh+ blood can trigger the production of anti-Rh antibodies and agglutination of RBC takes place. But a person with Rh+ blood can receive blood from a person with Rh- blood without any problems and a person that lacks the Rh factor (Rh-) can donate to individuals of the Rh+ and Rh- groups.

Thus, the correct answer is option D.