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: Pediatrics
[{'content': 'Which is not a feature of the posterior urethral valve – \nSelect and explain. \nA. Palpable bladder, B. Painful stress incontinence, C. Recurrent UTI, D. Hydronephrosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Back pressure in posterior urethral valve causes hydronephrosis and distended bladder.\nThere is thin urinary stream and urinary stasis causes recurrent UM.', 'role': 'assistant'}]