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: Medicine
[{'content': 'Pancreatic pseudocyst most commonly occurs after \nSelect and explain. \nA. Trauma, B. Pancreatitis, C. Pancreatic surgery, D. Pancreatic malignancy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Pancreatitis) Most common cause of pancreatic pseudocyst is Pancreatitis (90%). The second most common cause is trauma (10%).', 'role': 'assistant'}]