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': "'Reinforcement' is used in - \nSelect and explain. \nA. Psychoanalysis, B. Hypnoanalysic, C. Abreaction, D. Conditioned learning", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]