Air in the biliary tract is seen in all except –: (A) Gall stone ileus, (B) Sclerosing cholangitis, (C) Carcinoma gall bladder, (D) Endoscopic papillotomy
Answer is B. Gallstone ileus, carcinoma gall bladder and endoscopic papillotomy can cause pneumobilia (air in biliary tract)
Ascending cholangitis (not sclerosing cholangitis) can cause pneumobilia.