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': 'Which is not a feature of caffeine withdraw!? \nSelect and explain. \nA. Depression, B. Headache, C. Tachycardia, D. Anxiety', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tachycardia', 'role': 'assistant'}]