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: 1733 - 1804
English Separatist theologian, natural philosopher, chemist, liberal political theorist historically credited with the discovery of oxygen, having isolated it in its gaseous state (though others have strong claims to the discovery).
Aristotle
Joseph Priestley
Emanuel Lasker
Werner Heisenberg