This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
False about obstructive jaundice 
Select and explain. 
A. Unconjugated bilirubin, B. Pruritus, C. Pale stools, D. Icterus
A: Unconjugated bilirubin
Answer: A: Unconjugated bilirubin 
Explanation: Obstructive jaundice Most common surgical cause of obstructive jaundice is CBD stones Characterized by dark urine, pale coloured stools, icterus and Pruritus Presence of urobilinogen in urine rules out obstructive jaundice USG is the best test to differentiate medical from surgical jaundice Unconjugated bilirubin is normal Ref: Harrison's 19th edition Pg no : 1998