This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Prophylactic maintenance level of lithium is \nSelect and explain. \nA. 0.6-0.8 mEq/L, B. 0.8-1.2 mEq/L, C. 2-4 mmol /L, D. 2-4 mEQ/L', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Just facts', 'role': 'assistant'}]