This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Pharmacology), Subject name: Pharmacology
[{'content': 'Plasma concentrations (g/mL) after administration of 5. 1 mg/kg of Gentamicin intravenously to a hypothetical patient has shown in the Graph. The red color depicted in the graph is dose given at \nSelect and explain. \nA. 24 hours, B. 12 hours, C. 8 hours, D. Threshold', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A', 'role': 'assistant'}]