Question: How much drug has been eliminated when 3 elimination half-lives have elapsed if 100 mg of drug has been administered IV via bolus and is adjusted to a monocompartmental model with first-order elimination: 
 Options:  <1> 87.5 mg. <2> 12.5 mg. <3> 75 mg. <4> 25 mg. <5> 50 mg.
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