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': 'Pleural fluid LDH / Serum fluid LDH ratio is _____, to in exudation pleural effusion \nSelect and explain. \nA. > 0.3, B. > 0.5, C. > 0.6, D. > 0.8', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pleural Fluid LDH is > 2/3rd\xa0of serum LDH in exudative pleural effusion. Hence Pleural Fluid LDH / Serum LDH is > 0.6.', 'role': 'assistant'}]