This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
"Phantom calyx/ Amputed calyx" on IVU is feature of 
Select and explain. 
A. Tuberculosis, B. Hydronephrosis, C. Bilharziasis, D. UPJ obstruction
A: Tuberculosis
Answer: A: Tuberculosis 
Explanation: .