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
A patient came with lower chest trauma with pain in abdomen. His BP is 60/40 pulse 120 next best investigation 
Select and explain. 
A. CT abdomen, B. USG FAST, C. MR Angiography, D. X-ray abdomen
B: USG FAST
Answer: B: USG FAST 
Explanation: Answer- B. USG FASTUSG is the investigation of choice in both stable as well as unstable patients."Blunt abdominal trauma initially is evaluated by FAST examination in most major trauma centers"