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
All of the following are causes of hemorrhagic pleural effusion except? 
Select and explain. 
A. Pulmonary embolism, B. Rheumatoid ahritis, C. Pancreatitis, D. TB
B: Rheumatoid ahritis
Answer: B: Rheumatoid ahritis 
Explanation: Hemorrhagic pleural fluid may result from : Trauma Malignancy Post-pericardiotomy syndrome Asbestos-related effusion Pulmonary embolism Tuberculosis Sub-phrenic disease