Question

why know person with 'O'blood group is considered as'universal donor'

Answer 1

More people in the world have the blood group 'o ' and

The people who contain blood group ' o ' can can be the donor for every other groups of blood .... Only the people who contain there blood group ' o ' can be the universal donor. ...

Answer 2

hey mate here is your answer

a person with blood group o negative is considered as universal donor because it is an recessive group whose presence will not
impure the blood and it can be given to person with any blood group

hope it will help you

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