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
Investigation of choice for evaluating a renal mass is ? 
Select and explain. 
A. Plain X-ray, B. CT scan, C. IVP, D. Renal scintigraphy
B: CT scan
Answer: B: CT scan 
Explanation: Ans. is'b'i.e., CT scan (Ref: Grainger &/e p.881) "Computed Tomography is still the investigation of for evaluating and characterizing solid renal masse