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': 'Lithium levels → normal therapeutic - \nSelect and explain. \nA. 0.5 to 0.7 mEq/lit, B. 0.7 to 1.1 mEq/lit, C. 0.1 to 0.3 mEq/lit, D. 1.5 to 2mEq/lit', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Blood lithium levels -\n\n\nTherapeutic level - 0.8-1.2 mEq/L\n\n(For t/t of acute mania)\n\nProphylactic level - 0.5-0.8 mEq/L\n\n(For relapse prevention in bipolar disorder)\n\nToxic lithium levels > 2.0 mEq/L', 'role': 'assistant'}]