Whom of the following has propounded the Psycho-Analytic theory?

Sigmund Freud propounded the Psychoanalytic theory of personality development, which focuses on the influence of the unconscious mind, defense mechanisms, and psychosexual stages (id, ego, and superego). Ivan Pavlov is associated with Classical Conditioning, Guilford with the Structure of Intellect theory, and Thorndike with Connectionism (Trial and Error).