This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Liver), Subject name: Surgery
One is not the feature of obstructive jaundice : 
Select and explain. 
A. Pruritis, B. Elevated level of S.bilirubin, C. Raised alkaline phosphatase, D. Raised Urinary urobilinogen
D: Raised Urinary urobilinogen
Answer: D: Raised Urinary urobilinogen 
Explanation: Ans. is 'd' ie Raised urinary urobilinogen As already explained in Nov 99 (Biochem) urinary urobilinogen is decreased in obstructive jaundice.Due to obstruction in excretion of bile there is increased serum levels of bile salts (causing pruritics) and alkaline phosphatase (a rise of more than 3 times is diagnostic of obstructive jaundice)