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
Cobra head deformity in the lower end of ureter is seen in: 
Select and explain. 
A. Ureterocele, B. Vesical diverticula, C. Carcinoma of urinary bladder, D. Urethral stricture
A: Ureterocele
Answer: A: Ureterocele 
Explanation: None