This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Most sentitive investigation of pancreatic carcinoma is \nSelect and explain. \nA. Angiography, B. ERCP, C. Ultrasound, D. CT scan', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., ERCP ERCP is the most sensitive test for detecting pancreatic cancer but CT scan is the inv. of choice. Schwaz writes - "Currently CT is probably the single most versatile and cost effective tool for the diagnosis of pancreatic cancer." CSDT writes - "In patients with a typical clinical history and a pancreatic mass on CT, ERCP is unnecessary. In the absence of a mass, an ERCP is indicated. It is the most sensitive test (95%) for detecting pancreatic cancer though specificity in differentiation between cancer and pancreatitis is low."', 'role': 'assistant'}]