This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthesia, Subject name: Pharmacology
[{'content': 'Muscle relaxant of choice in liver disease is? \nSelect and explain. \nA. Atracurium, B. Pipecuronium, C. Rocuronium, D. Vecuronium', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. (A) Atracurium(Ref: Katzung 11th/e p456, KDT 8th/e p.380)Atracurium and cis-atracurium are degraded spontaneously by Hoffman's elimination. These do not require liver or kidney for elimination and thus are muscle relaxant of choice in a patient with renal and hepatic dysfunction.Other drugs mentioned in the question are metabolized by liver and thus should be avoided in hepatic failure.", 'role': 'assistant'}]