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': 'Adder head appearance on intravenous pyelographv is seen in: March 2012 \nSelect and explain. \nA. Hydronephrosis, B. Horse shoe kidney, C. Ureterocoele, D. Tubercular cystitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans: C i.e. Ureterocoele Radiological signs associated with urinary system Hydronephrosis on nephrogram will show rim sign Horse shoe kidney will show flower vase curves of ureter on radiographs Cobra head sign is classically seen with an intravesical (ohotopic) Ureterocoele Thimble bladder is radiological appearance of TB cystitis.', 'role': 'assistant'}]