This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
[{'content': 'Gold standard investigation for chronic pancreatitis is: \nSelect and explain. \nA. MRI, B. ERCP, C. Pancreatic function tests, D. Faecal fat estimation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) ERCP.Ref: Sabiston\'s Textbook of Surgery, 20th ed p-1533Imaging Investigations for Chronic Pancreatitis:* CT Scan: Dilated duct, Atrophy and calcification can be seen, Sensitivity = 60-90%, Specificity = 85-100%* MRCP: Sensitivity is lower than CT scan in detecting calcification.* ERCP: Old Gold Standard" - Now used only as therapeutic to stent in strictures in duct.* Latest Most Sensitive and Gold standard is Endoscopic USG - Rosemont criteria is used', 'role': 'assistant'}]