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
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 
Select and explain. 
A. 24 hours, B. 12 hours, C. 8 hours, D. Threshold
A: 24 hours
Answer: A: 24 hours 
Explanation: Ans: A