A 55K patient was given a 400 dose of an oral medication. Once the drug was completely absorbed, the following pharmacokinetic parameters were calculated: drug volume of distribution =1.65K; Clearance =25ℎ; Plasma concentration =1.32. What is the oral bioavailability of this medication?
O 100%
O 90%
O 60%
O 30%
O 15%