<prompt> Most common cause of cholangitis -Viral infectionCBD stoneSurgeryAmoebic infection  <response>: Gall stones are the most common cause of obstruction in cholangitis.Other causes arebenign malignant stricturesparasitesinstrumentation of the ducts and indwelling stentspartially obstructed biliary enteric anastomosisMost common organisms cultured from bile in patients with cholongitis includeEscherichia coliKlebsiella pneumoniaeStreptococcus faecalisEnterobacterBacteroides fragilis 