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': 'Pleural effusion in rheumatoid ahritis is typically associated with the following features except \nSelect and explain. \nA. Glucose > 60 mg/dl, B. Protein > 3 gm/di, C. Pleural fluid protien to serum protein ratio of >0 .5, D. Pleural fluid LDH to serum LDH ratio of >0.6', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Glucose > 60 mg/dl Causes of low glucose pleural fluid Malignancy Rheumatoid ahritis Empyema Hemothorax Paragonimiasis Churg strauss syndrome Lupus pleuritis (occasionally)", 'role': 'assistant'}]