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: Surgery
[{'content': 'Ratio of Pleural Fluid protein to serum protein is _______ in transudative pleural effusion \nSelect and explain. \nA. < 0.3, B. < 0.4, C. < 0.5, D. < 0.6', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pleural Fluid Protein / Serum. Protein is < 0.5 in transudative effusion.', 'role': 'assistant'}]