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: Medicine
[{'content': 'All of the following drugs are useful in the treatment of a patient with acute bronchial asthma except \nSelect and explain. \nA. Ipratropium, B. Salbutamol, C. Montelukast, D. Hydrocortisone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]