This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscle relaxants, Subject name: Anaesthesia
[{'content': 'Which of the following is not an amino steroid deprivative \nSelect and explain. \nA. Alcuronium, B. Vecuronium, C. Pancuronium, D. Pipecuronium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Non-depolarising neuro-muscular blockers are classified in to 2groups based on chemical structure. 1.Benzylisoquinolones: d-tubocurare, Atracurium, Cis-atracurium, Dexacurium, Mivacurium ,Alcuronium. 2.Amino-steroid derivatives : Pancuronium, Vecuronium, rocuronium, pipecuronium, rapacuronium.', 'role': 'assistant'}]