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: Radiology
[{'content': '"Chain of lakes" appearance on X-ray is seen in: \nSelect and explain. \nA. Chronic pancreatitis, B. Acute pancreatitis, C. Carcinoma head of pancreas, D. Adenocarcinoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Chronic pancreatitis', 'role': 'assistant'}]