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Railways PYQCBT 1 2016

RRB NTPC · Question 97

Who discovered the AB-O blood group system?

  1. Karl Koller

  2. Maurice Hilleman

  3. Karl Landsteiner

  4. Edward Jenner

Show answer & explanation

Answer: (C) Karl Landsteiner

Explanation

Karl Landsteiner, an Austrian scientist, discovered the ABO blood group system in 1901, which made safe blood transfusions possible. He received the 1930 Nobel Prize in Medicine.