This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal Radiography, Subject name: Radiology
[{'content': 'Investigation of choice for minimal Ascites is? \nSelect and explain. \nA. X Ray, B. USG, C. CT, D. MRI', 'role': 'user'}, {'content': "Answer: B \nExplanation: ANSWER: (B) USGREF: Maingot's 10th ed p 101Investigation of choice for minimal Ascites is USG", 'role': 'assistant'}]