Which blood group is often referred to as the universal donor?

Explanation

O negative blood is called the universal donor because it lacks A, B, and Rh antigens on its red blood cells, meaning it is generally compatible with recipients of any blood type in emergency transfusions. Conversely, AB positive blood is known as the universal recipient, since people with this type can typically receive blood from any group. Blood type compatibility is critical because mismatched transfusions can trigger dangerous immune reactions. Explore more Everyday Science MCQs on mcqstutor to keep practicing.