This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney & Ureturs, Subject name: Surgery
[{'content': 'Not true about PUJ obstruction is: \nSelect and explain. \nA. Retrograde pyelography is useful to locate the site of obstruction, B. Endoscopic pyelotomy is contraindicated, C. Whittaker test is of clinical significance, D. Dismembered pyeloplasty is the procedure of choice', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Endoscopic pyelotomy is contraindicatedPUJ obstruction Salient points:Most common cause of fetal hydronephrosisMost common in boys, most common in left sideBilateral in 10-15%IOC is DTPA scanAnderson Hynes Pyeloplasty is the Gold standard treatmentEndoscopic treatment is endoscopic pyelotomy', 'role': 'assistant'}]