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': 'Sudden discontinuation of which of the following drugs can cause agitation, anxiety and insomnia? \nSelect and explain. \nA. Imipramine, B. Valproate, C. Olanzapine, D. Venlafaxine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Venlafaxine is the most common drug associated with discontinuation syndrome.', 'role': 'assistant'}]