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': 'Amylase increased in pleural fluid is seen in following except - \nSelect and explain. \nA. Rheumatoid arthritis, B. Esophageal perforation, C. Malignancy, D. Gall stone pancreatitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]