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
[{'content': 'A fundamental technique used in psychoanalysis is : \nSelect and explain. \nA. Concentration, B. Hyponsis, C. Empathy, D. Free association', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D. i.e. Free association', 'role': 'assistant'}]