Coco Trivia

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Which doctor first discovered blood groups?

Frederick Gowland Hopkins

Horace Wells

Karl Landsteiner

Robert Koch

Padlock

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Source:

Choice "A": Frederick Gowland Hopkins of users selected this choice.
Choice "B": Horace Wells of users selected this choice.
Choice "C": Karl Landsteiner of users selected this choice.
Choice "D": Robert Koch of users selected this choice.

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