Question

In laboratory, if blood samples of a person react with "anti $A$ " antiserum and do not react with "anti $B$ " antiserum and $Rh$ antibodies, the blood group of that person is

• A. $A{B}^{-}$
• B. $A^{-}$
• C. $O^{-}$
• D. $O^{+}$

Answer 1

The correct option is B $A^{-}$

(A) ${AB}^{-}$ blood reacts with both anti-A and anti-B antiserums but will not react with the Rh antibodies.

(B) $A^{-}$ blood reacts with anti A antiserum but does not react with anti B antiserum and Rh antibodies.

(C) $O^{-}$ blood does not react with anti-A or anti B antiserums or with Rh antibodies. Hence, $O^{-}$ blood donors are known as universal donors as it is not rejected by the recipient.

(D) $O^{+}$ blood does not react with anti-A or anti B antiserums but reacts with Rh antibodies.

So the correct answer is '$A^{-}$'.