<prompt> 45 year old patient presents with acute cholecystitis. Blood investigation showed raised bilirubin. His pain resolved over the period but raised Bilirubin persisted. ERCP showed cholecystocholedochal fistula. What is the probable diagnosisMirizzi syndromeCholangitisCarolis diseaseHepatic fibrosis  <response>: Mirizzi syndrome is obstructive jaundice caused usually due to cholecystocholedochal fistula. 