Question

A girl’s blood group is o. which group of people can donate blood to her?

Answer 1

If she is O+ then others of O+ and O- can donate to her. If she is O- then only those with O- can give blood to her.

Answer 2

O blood group

Explanation: The blood group O is considered a universal donor. Therefore it can donate to all blood groups. But the O blood group only receives from the person having O blood group.

Here rhesus factor is not given. If it is given then it may be O positive or O negative. The O positive person receives from only O positive blood group and so on.