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': 'FAST is used for: \nSelect and explain. \nA. Fast assessment of major visceral injuries, B. To look for free intraperitoneal fluid at specific sites, C. Fast assessment by CT scan to detect intraabdominal injuries, D. Quick clinical assessment to decide about laprotomy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]