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: Radiology
[{'content': 'Minimum fluid collection required for radiological detection of pleural effusion in lateral decubitus view is: September 2009 \nSelect and explain. \nA. 15 ml, B. 25 ml, C. 35 ml, D. 45 ml', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Amount of pleural fluid required to cause a blunted costophrenic angle discernible on chest radiography is more than 300 ml. A chest computerized tomography scan is more sensitive than a simple chest x-ray and is often used for assessment of loculated effusions because, in some instances, up to 500 cc of loculated fluid can be obscured behind the dome of the diaphragm', 'role': 'assistant'}]