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: Radiology
[{'content': 'Pine - tree bladder is a sign of \nSelect and explain. \nA. Pelvic abscess, B. Neurogenic bladder, C. Bilharziasis, D. Intro peritoneal bladder rupture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]