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': 'Which is the investigation of choice for retroperitoneal soft tissue sarcomas \nSelect and explain. \nA. MRI, B. CT Scan, C. USG, D. PET scan', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. CT ScanCT is the investigation ofchoice for retroperitoneal soft tissue sarcomas.', 'role': 'assistant'}]