Testing for Bilirubin

Question

When a patient has a bile duct obstruction, the bilirubin test portion of the reagent strip is:

Please select the single best answer

negative because unconjugated bilirubin is increased and cannot be excreted by the kidneys.
positive because unconjugated bilirubin is increased and is excreted by the kidneys.
negative because conjugated bilirubin is decreased and cannot be excreted by the kidneys.
positive because conjugated bilirubin is present and is excreted by the kidneys.

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