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 useful in the treatment of a patient with acute bronchial asthma except : \nSelect and explain. \nA. Ipratropium, B. Salbutamol, C. Montelukast, D. Hydrocoisone', 'role': 'user'}, {'content': "Answer: C \nExplanation: Answer is C (Montelukast): `Leukotriene modifiers (eg. Monteleukast, Zafirulukast) may be considered as alternatives to low dose inhaled coicosteroids in patients with mild persistent asthma' - CMDT They have no role in aboing an attack of acute severe asthma.", 'role': 'assistant'}]