This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney and ureter, Subject name: Surgery
[{'content': 'The most sensitive imaging modality to detect early renal tuberculosis is: \nSelect and explain. \nA. Intravenous urography, B. Computed tomography, C. Ultrasound, D. Magnetic resonance imaging', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Genitourinary tuberculosis Investigations- Urine routine and microscopic examination- presence of pus cells- Urine culture and sensitivity- no growth within 48 hours. (Sterile Pyuria- characteristic feature of GU TB)- IOC for diagnosis of renal TB-CECT- Most sensitive investigation to detect the earliest changes in renal TB- IVP (aka IVU)', 'role': 'assistant'}]