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: Pharmacology
[{'content': 'All are used in bronchial asthma EXCEPT: March 2004 \nSelect and explain. \nA. Salbutamol, B. Morphine, C. Aminophylline, D. Steroid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Morphine', 'role': 'assistant'}]