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
Pancreatic pseudocyst most commonly occurs after ? 
Select and explain. 
A. Trauma, B. Pancreatitis, C. Pancreatic surgery, D. Pancreatic malignancy
B: Pancreatitis
Answer: B: Pancreatitis 
Explanation: Ans. is 'b' i.e. Pancreatitis Most common cause of pancreatic pseudocyst is Pancreatitis (90%) The second most common cause is trauma (10%). Pseudocysts are seen in both acute and chronic pancreatitis.