Which blood group is called universal donor ?

Options

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

Answer

B

Explanation

Universal donor is a person who is type O in the ABO blood group system and negative for RhD blood group antigen and can donate blood to all recipients. O- blood type doesn.t have antigen for A or B and Rh antigen on the surface of its RBCs. Because of the absence of Rh factor, O- blood type can be given to patients of either Rh type.