Difficulty: Medium
Average Score: 91%
Simulated
Which blood type is known as the universal donor?
Correct answer
D
Rationale
O negative blood is known as the universal donor type because it lacks A, B, and Rh antigens on the surface of red blood cells. This means it can be safely transfused to individuals of any blood type without triggering an immune reaction. However, people with O negative blood can only receive blood from other O negative donors. This universal compatibility makes O negative crucial in emergencies when the patient├óÔé¼Ôäós blood type is unknown. Due to its scarcity, O negative blood is highly valued in blood banks and hospitals worldwide.