<prompt> On exposure to air, urine colour changes to olive green in poisoning with: PGI June 2008Carbolic addCyclophosphamidePhenopthaleinEthelene glycol  <response>: Ans.: A Carbolic acid poisoning Carbolic acid phenol poisoning urine may be colorless or slightly green at first but turns green-1 or even black on exposure to air- Reddy 27thf470Carbolic acid0OxidationOxidation metabolism in bodyHvdroquinone pvrocatecholExcreted in urineFurther oxidationGreen colour of Urine carboluriaQ 