Multiple choice

My discovery allows you to have blood transfusions

  1. Karl Lansteiner

  2. John Hunter

  3. Frederick Banting

  4. William Harvey
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Karl Landsteiner (spelled Lansteiner in the option) discovered the major human blood groups (A, B, and O) in 1900. This discovery explained why previous blood transfusions often resulted in patient death and made safe, compatible blood transfusions possible.

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