<prompt> Absent urobilinogen in urine with icterus indicates?Perihepatic obstructionHemolysisHepatitisLiver failure  <response>: Ans. a Perihepatic obstructionRef: Robbins 9th830-840; Harrisons 18thchapter 42ConditionSerum BilirubinUrine UrobilinogenUrine BilirubinFecal UrobilinogenNormalDirect 0.1-0.4 mgdlIndirect 0.2-0.7 mgdl0.4 mg24 hAbsent40-280 mg24hHemolytic anemiaIndirectIncreasedAbsentIncreasedHepatitisDirect and indirectDecreased if micro obstruction is presentPresent if micro obstruction occursDecreasedObstructive jaundice DirectAbsentPresentTrace to absent 