This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
"8 stages of psychosocial development" were given by 
Select and explain. 
A. Sigmond Freud, B. Carl Jung, C. Erik erikson, D. Roger Sperry
C: Erik erikson
Answer: C: Erik erikson 
Explanation: Erik erikson gave 8 stages of psychosocial / personality development where an individual experience psychological conflict in each stage.
Roger Sperry: Gave concept of "Split - brain".