<prompt> Frostburgs reverse 3 sign is seen inPeriampullary carcinomaAnnular pancreatic carcinomaCarcinoma head of pancreasAll  <response>: Reversed 3 sign of frost berg Carcinoma head of pancreas.Double duct sign Periampullary carcinoma.Beaded appearance of biliary ducts Primary sclerosing cholangitis. 