<prompt> Best treatment for the given type of cholecystitis is:Urgent cholecystectomy or cholecystostomy under antibiotic coverageConservative management followed by interval cholecystectomyConservative treatment and treat primary cause like DMUrgent ERCP  <response>: In X-Ray, GB shows presence of air, that gives the diagnosis of emphysematous cholecystitis. M.C organism responsible for emphysematous cholecystitis is clostridium perfringens anaerobe. M.C aerobic organism responsible is E. coli. - Cause of Xanthogranulomatous cholecystitis non -infectious condition- rupture of Rokitansky-Aschoff sinuses. Investigation of choice: NCCT. Rx: Urgent cholecystectomy or cholecystostomy antibiotics. 