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: Pharmacology
[{'content': 'A child presents with bladder exstrophy and chronic renal failure. The muscle relaxant of choice to be used during the surgery of exstrophy in this child is : \nSelect and explain. \nA. Atracurium, B. Mivacurium, C. Pancuronium, D. Rocuronium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]