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: Surgery
[{'content': 'Investigation of choice for vesicoureteric reflex \nSelect and explain. \nA. USG KUB, B. Micturating cystourethrography, C. CT, D. MRI', 'role': 'user'}, {'content': 'Answer: B \nExplanation: MCU is IOC for vesicoureteric reflex.', 'role': 'assistant'}]