Question Detail
Question
The A, B, O blood groups were discovered by
Correct Answer
Option A is the correct answer.
Detailed Explanation
Karl Landsteiner, an Austrian immunologist and pathologist, discovered the ABO blood group system in 1901. He identified the presence of different antigens on red blood cells, leading to the classification of blood types A, B, AB, and O. This discovery earned him the Nobel Prize in Physiology or Medicine in 1930.
Hint
This Austrian immunologist won a Nobel Prize for his discovery of the major human blood groups.