<prompt>  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 mlmin; half life is 8 hrs. If an intravenous infusion of theophylline is started at a rate of 0.48 mgmin, how long will it take to reach 93.75 of the final steady state ?Approximately 48 minApproximately 5.8 hrsApproximately 8 hrsApproximately 32 hrs 