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': 'What is the investigation of choice in a patient with blunt abdominal trauma with hematuria- \nSelect and explain. \nA. USG of the abdomen, B. CECT, C. IVP, D. Retrograde urogram', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]