This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pharmacology, Subject name: Pharmacology
[{'content': 'Pharmacokinetic characteristics of propranolol include Vd = 300 L/70 kg, C1 = 700 mL/min, and oral bioavailability f = 0.25. What is the dose needed to achieve a plasma level equivalent to a steady state level of 20 mg/L? \nSelect and explain. \nA. 4 mg, B. 12 mg, C. 24 mg, D. 48 mg', 'role': 'user'}, {'content': 'Answer: C \nExplanation: LD = 300L x 20 mg/L / 0.25 = 6000 mg/0.25 = 24,000 mg or 24 mg Ref:- kd tripathi; pg num:-33', 'role': 'assistant'}]