Question

Which blood group is universal donor

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

Answer 1

Answer: (B)

$O^{-}$

O- is universal donor as they don't have any kind of antigens like A, B and Rh factor. It does not create any complications to the recipients of any kind of blood group.

So, the correct answer is B.