Which of the below is the universal donor?

A. AB+
B. AB-
C. O-
D. O+

Brief Facts about Blood Groups:

Currently, four (04) Primary Blood Groups exist in human beings. Such as, Group A, Group B, Group AB and Group O. The blood group is determined by the genes we inherit from our parents. Blood is consisted upon white blood cells, red blood cells and platelets i.e. called plasma. Blood group O is the most common blood group. AB+ blood group is known as Universal Recipient which means one can receive blood from any blood group holder. Similarly, O- blood group is better known as Universal Donor which means he can donate blood to any blood group person. Injecting blood of wrong match group is life-threatening.

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