<prompt> Which one of the following drugs does not have active metabolite ?DiazepamPropranololAllopurinolLisinopril  <response>: - Among the given options, only Lisinopril does not have an active metabolite. Except for Captopril and Lisinopril, all Angiotensin Converting Enzyme ACE inhibitors are prodrugs.- Diazepam produces Oxazepam and many other active metabolites.- Propranolol can give rise to 4-hydroxyPropranolol which has β antagonist activity- Oxypurinol is produced from Allopurinol. 