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: Unknown
[{'content': 'Which of the following is an ultrashort acting muscle relaxant ? \nSelect and explain. \nA. Rocuronium, B. Atracurium, C. Succinyl choline, D. Doxacurium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans- C Fastest acting MR Scoline Fastest acting NDMR Rocuronium Shortest acting MR Gantacurium or scoline Shortest acting NDMR Gantacurium or mivacurium Longest acting MR Doxacurium', 'role': 'assistant'}]