This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Radiology
[{'content': 'You are shown an AP view from a percutaneous trans-hepatic cholangiogram of a jaundiced patient. What is the MOST likely diagnosis? \nSelect and explain. \nA. Pancreatic carcinoma, B. Sclerosing cholangitis, C. Cholangiocarcinoma, D. Cholelithiasis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: RA denotes right anterior ductal system, RP denotes right posterior ductal system,L left duct, G gallbladder. Broad open arrow points to pa of duct narrowed due to tumour, broad solid arrow to track of percutaneous neddle used to inject contrast,arrow head to cystic duct, curved arrow to common hepatic duct Reference from sutton radiology diagnostics', 'role': 'assistant'}]