In obstructive (cholestatic) jaundice conjugated bilirubin cannot reach the gut, so it backs up into the blood: serum conjugated bilirubin is raised, not reduced - so C is the false statement.

• It spills into the urine (dark urine), so A is true.
• Little bilirubin reaches the intestine, so fecal stercobilinogen falls (clay stools) and urinary urobilinogen is reduced/absent - B and D are true.