Psychodynamic theory among the following is/are:: (A) Psychosexual theory., (B) Psychosocial theory., (C) Cognitive theory., (D) All of the above.
Answer is D. I. Psychodynamic theories

 Psychosexual theory   -  Sigmund Freud
 Psychosocial theory    -  Eric Erickson
 Cognitive theory          -  Piaget

II.Behavioural theories

 Hierarchy of needs - Maslow
 Social learning theory - Bandura  
 Classical conditioning - Pavlov 
 Operant conditioning - Skinner