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: Pediatrics
[{'content': 'Which of the following is the most common cause of pancreatic pseudocyst? \nSelect and explain. \nA. Ca pancreas, B. Pancreatitis, C. Trauma, D. ERCP', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pancreatic pseudocysts mostly occur as a complication of acute and chronic pancreatitis. In children, abdominal trauma is the most common cause.', 'role': 'assistant'}]