Who was the hero who anwsered the riddle of the sphinx in greek heries?

The hero who answered the riddle of the Sphinx in Greek mythology was Oedipus. The Sphinx posed the riddle, "What walks on four legs in the morning, two legs at noon, and three legs in the evening?" Oedipus correctly answered "Man," referring to the stages of human life. His success in solving the riddle led to the Sphinx's defeat and the liberation of Thebes.