This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
[{'content': 'The drug inactivated in plasma by spontaneous non enzymatic degradation is: \nSelect and explain. \nA. Atracurium, B. Vecuronium, C. pipecuronium, D. Pancuronium', 'role': 'user'}, {'content': "Answer: A \nExplanation: Atracurium in plasma undergoes spontaneous non enzymatic degradation(Hoffman elimination)in addition to that by cholinesterases. All other given drugs don't undergo Hoffman elimination. From Tripati 7th edition Page no 353", 'role': 'assistant'}]