sunflowerlove5209 sunflowerlove5209 22-02-2024 Biology contestada The reference range of urobilinogen isa. 0.1-1.0 mg/dL every 2 hours.b. 0.1-1.0 µmol/L every 2 hours.c. 0.1-1.0 Ehrlich units every 2 hours.d. 0.1-1.0 Babson units every 2 hours.