This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pediatrics
[{'content': 'Which is not a feature of posterior urethral valve: \nSelect and explain. \nA. Palpable bladder, B. Painful stress incontinence, C. Recurrent UTI, D. Hydronephrosis', 'role': 'user'}, {'content': "Answer: B \nExplanation: b. Painful stress incontinence(Ref: Nelson's 20/e p 2562-2567, 2573, Ghai 8/e p 485-486)High Yield Points:Posterior urethral valves are the commonest cause of lower urinary tract obstruction in boys.In PUV, Prostatic urethra dilates, & bladder muscle undergoes hypertrophy; Hydronephrosis or renal dysplasia may also develop;Vesicoureteral reflux occurs in 50% and 30% of patients experience end stage renal disease or chronic renal insufficiency.", 'role': 'assistant'}]