This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cognitive development and defence mechanism, Subject name: Psychiatry
[{'content': 'The Psycho Social stages/ Eight-stage ego development across the life cycle is the centre piece of whose life work? \nSelect and explain. \nA. Sigmund freud, B. Pavel, C. Strauss, D. Erik H Erikson', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The eight stages of ego development are Stage1- trust vs mistrust Stage2- autonomy vs shame and doubt Stage3- initiative vs guilt Stage4- industry vs inferiority Stage5- identity vs role confusion Stage6- intimacy vs isolation Stage7- generativity vs stagnation Stage8- intgrity vs despair. Ref: Synopsis of Psychiatry, 11e, pg 169.', 'role': 'assistant'}]