Psychological new ideas like Consciousness, Subconsciousness and Unconsciousness were presented by?
(a) John Dewey
(b) Wundt
(c) Sigmund Freud
(d) Skinner
✅ Correct Answer: (c) Sigmund Freud
Explanation: Freud introduced the concepts of conscious, subconscious, and unconscious levels of the human mind.