Question

A man whose blood group is not known meets with a serious accident and needs blood transfusion immediately, which one of the blood groups readily available in the hospital will be safe for transfusion?

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

Answer 1

Answer: (A)

O, Rh${}^{-}$

Donors with blood group O, $Rh^−$ can donate to recipients with blood types A, B, AB and O (O is the universal donor), because it does not have any antigen, thereby no reaction would occur with the antibody, which may be present in donor's body. Hence, option A is correct.