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: Anaesthesia
[{'content': 'Which of the following undergoes Hoffmann elimination? \nSelect and explain. \nA. Rocuronium, B. Vecuronium, C. Succinylcholine, D. Atracurium', 'role': 'user'}, {'content': "Answer: D \nExplanation: Atracurium is a bis-benzyltetrahydroisoquinolinium with isoquinolinium nitrogens connected by a diester-containing hydrocarbon chain. The presence (in duplicate) of two-carbon separations between quaternary nitrogen and ester carbonyl provides the basis for a Hofmann elimination reaction. Fuhermore, it can undergo ester hydrolysis. In a Hofmann elimination reaction, a quaternary ammonium group is conveed to a teiary amine by cleavage of a carbon-nitrogen bond. Ref: Miller's Anesthesia 7th Ed , Chapter 29.", 'role': 'assistant'}]