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. Buying, B. Cellular phone use, C. Internet use, D. Selfmultilation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Oniomania is compulsive buying.', 'role': 'assistant'}]