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: Radiology
[{'content': 'The investigation of choice for imaging of urinary tract tuberculosis is: \nSelect and explain. \nA. Plain X-ray, B. Intravenous urography, C. Ultrasound, D. Computed tomography', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Intravenous urography', 'role': 'assistant'}]