Question

if blood is in short supply, which blood type would be the most beneficial to have on hand if someone needed a blood transfusion?
○ o+
○ o–
○ ab+
○ ab–

Explanation:

To determine the most beneficial blood type in short supply, we recall blood transfusion principles. O - (O negative) is the universal donor for red blood cells, as it has no A, B, or Rh antigens, so it can be given to any blood type without triggering an immune reaction (except in rare cases). O+ can't be given to Rh - negative patients. AB+ is a universal recipient, not a good donor for most. AB - has limited donor compatibility. So O - is most beneficial as a donor in shortages.

Answer:

B. O–