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: Pharmacology
[{'content': 'A patient of endogenous depression was prescribed imipramine. After what duration of the time interval is the therapeutic effect of imipramine likely to manifest? \nSelect and explain. \nA. Three days, B. One week, C. Three weeks, D. Three months', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]