This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pleural effusion & Pulmonary alveolar proteinosis, Subject name: Medicine
[{'content': 'All of the following are causes of hemorrhagic pleural effusion except? \nSelect and explain. \nA. Pulmonary embolism, B. Rheumatoid ahritis, C. Pancreatitis, D. TB', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hemorrhagic pleural fluid may result from : Trauma Malignancy Post-pericardiotomy syndrome Asbestos-related effusion Pulmonary embolism Tuberculosis Sub-phrenic disease', 'role': 'assistant'}]