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
Ultrasound is investigation of choice for 
Select and explain. 
A. Somatostatinoma, B. Urethral stricture, C. Blunt abdominal trauma, D. Intraductal Pancreatic calculi
C: Blunt abdominal trauma
Answer: C: Blunt abdominal trauma 
Explanation: 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.