<prompt> Which of the following drug used in gout act by conveing uric acid into allantoin ?ColchicineAllopurinolProbenacidRasburicase  <response>: Ans: D. RasburicaseDrugs increasing metabolism of uric acid:Urate oxidase metabolizes insoluble uric acid to soluble allantoin in the birds.This enzyme is absent in humans.Rasburicase a recombinant urate oxidase is used for this Purpose.PEGylateil uricase pegloticase is another similar drug. 