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': 'Straining and dribbling of urine in a male infant with recurrent urinary infection should lead to the suspicion of : \nSelect and explain. \nA. Vesico – ureteric reflux, B. Posterior urethral valve, C. Pelvic ureteric junction obstruction, D. Phimosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The informations provided in this question are :\n\n\nStraining —> Sign of obstruction\nDriblling\xa0 —>\xa0\xa0Sign of obstruction and incomplete bladder emptying.\nUTI\xa0May be due to urinary obstruction.\n\n\nAll these suggest the diagnosis of obstructive uropathy, and posterior urethral valve is most common cause of obstructive uropathy.', 'role': 'assistant'}]