Person with blood group AB is considered as universal recipient because he has
| 1. | Both A and B antigens on RBC but no antibodies in the plasma |
| 2. | Both A and B antibodies in the plasma |
| 3. | No antigen on RBC and antibody in the plasma |
| 4. | Both A and B antigens in the plasma but no antibodies. |
A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid cetificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?
| 1. | Type AB | 2. | Type O |
| 3. | Type A | 4. | Type B |