This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'Ultrasound is investigation of choice for \nSelect and explain. \nA. Somatostatinoma, B. Urethral stricture, C. Blunt abdominal trauma, D. Intraductal Pancreatic calculi', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Focused abdominal sonogram for trauma (FAST) Focused assessment with sonography for trauma (FAST) examination is a bedside screening tool to identify free intra peritoneal, pleural and pericardial fluid. It is limited ultrasound examination with 6 views. The average time to perform a complete FAST examination is 2-4 minutes.', 'role': 'assistant'}]