<prompt> TRIANGULAR CORD Sign is seen in?Carolis DiseaseSerous CystadenomaBiliary AtresiaHydatid of Liver  <response>: Biliary atresia: Has empty GB fossa Ghost gall bladder Triangular cord sign is seen. Triangular cord sign represents the fibrous ductal remnant of the extrahepatic bile duct in biliary atresia. Carolis disease: It is a type V choledochal cyst - Intrahepatic biliary dilatation Shows central dot sign Hydatid of Liver Serous cystadenomas of pancreas: - demonstrates multicystic, lobulated mass in head of pancreas - characterised by centrally enhancing scar showing stellate calcification -bunch of grapes appearance is seen on axial T2 MRI image. 