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
Gold standard investigation for chronic pancreatitis? 
Select and explain. 
A. MRI, B. ERCP, C. Pancreatic function tests, D. Fecal fat estimation
B: ERCP
Answer: B: ERCP 
Explanation: Answer- B. ERCPERCP has been considered the most sensitive radiologic test for the diagnosis of chronic pancreatitis, with specific ERCP findings that are highly correlative with the degree or stage of chronic disease.