If have blood O what should be the blood type of donor?

Answer 1

A person with blood type O can only receive blood from donors with blood type O. This is because individuals with blood type O have both A and B antibodies in their plasma, making it incompatible with blood types A, B, and AB. However, individuals with blood type O are considered universal donors as they can donate blood to individuals with any blood type (A, B, AB, or O).