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: Surgery
A 3 year old girl presents with recurrent UTI. On USG shows hydronephrosis with filling defect and negative shadow of bladder with no ectopic orifice? 
Select and explain. 
A. Vesicoureteric reflux, B. Hydronephrosis, C. Ureterocele, D. Sacrococcygeal teratoma
C: Ureterocele
Answer: C: Ureterocele 
Explanation: Ans. is 'c' i.e., Ureterocele