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': 'Oniomania is a disorder of compulsive: \nSelect and explain. \nA. Stealing, B. Gambling, C. Buying, D. Hair pulling', 'role': 'user'}, {'content': "Answer: C \nExplanation: Oniomania is a compulsive disorder that drives people to buy in a repetitive and uncontrolled manner regardless of consequences. Oniomania is an example of a reactive impulse or impulsive insanity. Although DSM IV-TR does not mention CBD, the disorder can be placed in the category 'impulse control disorder not otherwise specified'. Ref: Impulse Control Disorders By Aboujaoude/Koran.", 'role': 'assistant'}]