This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Psychiatry
[{'content': 'Typically changes in a problem behavior shows how many stages: \nSelect and explain. \nA. 2, B. 3, C. 4, D. 5', 'role': 'user'}, {'content': 'Answer: D \nExplanation: According to the transtheoretical model, there are 5 stage of change in substance use and other problem behaviors. Pre- contemplation- Person taking substance does not think its a problem Contemplation- Stas realizing that he has a problem Preparation- Takes a decision & stas planning Action - Quits and makes change in behavior Maintenance', 'role': 'assistant'}]