Ans. is 'd' i.e. Clinical observation 100 ml. of Bile output from the patient on the 1st postop. day without any other abnormality is of no clinical significance, so does not warrant any action from the surgeon. But remember if passing of 100 ml of bile continues for 5-6 days then it is considered abnormal. It denotes bile duct injury.Oxford textbook of Surgery writes - "Even after a straightforward cholecystectomy there may be a little bile in the drain the following day."Textbook of Liver and Biliary Surgery writes - "A small amount of biliary> drainage following cholecystectomy should cause no alarm because it usually disappears within 1 or 2 days. However, excessive biliary drainage through the wound or drain site, jaundice, sepsis, or a combination of these events early in the post op. period should suggest a bile duct injury, as should copious biliary drainage for more than a few post-op days".