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': 'The prophylactic blood level of Lithium is \nSelect and explain. \nA. 0.3 mEq/L, B. 0.6 mEq/L, C. 0.9 mEq/L, D. 1.2 mEq/L', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The prophylactic blood level of Lithium is 0.5 - 0.8 mEq/L.', 'role': 'assistant'}]