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
Which of the following imaging modality is most sensitive (investigation of choice) to detect early renal tuberculosis. 
Select and explain. 
A. Intravenous urography, B. Ultrasound, C. Computed tomography, D. Magnetic resonance imaging
A: Intravenous urography
Answer: A: Intravenous urography 
Explanation: A i.e. Intravenous urography