B. Sophocles
Oedipus Rex is the Latin title of the play Oedipus The King written by Sophocles. The play is a Greek tragedy and was performed for the first time as long ago as 429 BC ! It is the first play in a trilogy written by Sophocles. The other two plays in the series about King Oedipus are Oedipus at Colonus and Antigone.
The play has been praised as the classic tragedy. Aristotle has praised and mentioned it many times in his work, Poetics.