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': 'All of the following is NOT a feature of an exudate? \nSelect and explain. \nA. Serum : Pleural Albumin ratio < 1.2mg/dl, B. Pleural fliud cholesterol > 55, C. Fluid : Serum Protein ratio > 0.5, D. Fluid : Serum LDH ratio > 0.6', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Serum : Pleural Albumin ratio < 1.2mg/dlPleural fliud cholesterol > 55Fluid : Serum Protein ratio > 0.5Fluid : Serum LDH ratio > 0.6', 'role': 'assistant'}]