This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rheumatoid Ahritis, Subject name: Medicine
[{'content': 'All of the following characteristics are found in pleural effusion fluid of a rheumatoid ahritis patient except: \nSelect and explain. \nA. RA factor positive, B. High glucose, C. Cholesterol crystals, D. High LDH', 'role': 'user'}, {'content': "Answer: B \nExplanation: Since pleural fluid in RA is an exudate it will have low sugar values. Cholesterol crystals are seen in long standing pleural effusion of RA. High LDH is explained by Light's criteria. Differentials if glucose in pleural fluid is less than 60 mg/dl Glucose <60 mg/dL Consider: Malignancy Bacterial infections Rheumatoid pleuritis", 'role': 'assistant'}]