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: Pharmacology
[{'content': 'Toxic dose of lithium - \nSelect and explain. \nA. 0.6, B. 12, C. 2.6, D. <0.6', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 2.6", 'role': 'assistant'}]