Instructions Full Game: These are multiple-choice quizzes with four possible answer choices that include all questions in a given set.     
Identify the following individual:

Lived: 1868 - 1943
Discovered the human blood group system, paving the way for safe blood transfusions. Also discovered the Rh factor in blood, proved polio is an infectious disease spread by a virus, and discovered haptens.
Albert Einstein
Karl Landsteiner
J. J. Thomson
Katherine Johnson