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': 'Treatment of acute asthma include all except- \nSelect and explain. \nA. Prednisolone, B. Salbutamol, C. Salmeterol, D. Ipratropium bromide', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Salmeterol o Long acting Beta - 2 agonists have no role in acute attack of asthma. They are useful in persistent asthma.", 'role': 'assistant'}]