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': 'Exudative pleural effusion is seen in \nSelect and explain. \nA. Congestive heart failure, B. Nephrotic syndrome, C. Mesothelioma, D. Cirrhosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]