What percentage of Caucasians is positive for the c antigen?

The correct answer reflects the observed prevalence of the c antigen within the Caucasian population. Approximately 80% of Caucasians test positive for the c antigen, which is a component of the Rh blood group system. This antigen, along with others in the Rh group, plays a significant role in blood compatibility and transfusion medicine.

Understanding the distribution of the c antigen is important because it can affect blood transfusions and organ transplants, where the matching of blood types is crucial for patient safety. This statistic is widely recognized in hematology and transfusion practices, making it essential information for medical technologists and professionals in blood banking and immunohematology.