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
A young male Kallu is brought to the hospital with severe asthma. The pharmacokinetics of theophylline include the following parameters: Vd = 35 L; CL = 48 ml/min; half life is 8 hrs. If an intravenous infusion of theophylline is started at a rate of 0.48 mg/min, how long will it take to reach 93.75% of the final steady state ? 
Select and explain. 
A. Approximately 48 min, B. Approximately 5.8 hrs, C. Approximately 8 hrs, D. Approximately 32 hrs
D: Approximately 32 hrs
Answer: D: Approximately 32 hrs 
Explanation: None