This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuromuscular Blocker, Subject name: Anaesthesia
[{'content': 'The clinical use of which of the following drug is stopped because of severe bronchospasm associated with it- \nSelect and explain. \nA. Rapacuronium, B. Rocuronium, C. Atracurium, D. Mivacurium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Rapacuronium is an aminosteroid compound that was introduced for clinical use in the limited states in 1999 and was withdrawn in 2001 because of rare, but severe, cases of bronchospasm.', 'role': 'assistant'}]