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': 'Which of the following is not given for acute severe bronchial asthma: March 2011 \nSelect and explain. \nA. Salbutamol, B. Terbutaline, C. Salmeterol, D. Methyl xanthine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: Salmeterol Sho acting beta2 agonits are the agent of choice for acute severe asthma Long acting beta-2 agonists (LABAs), such as salmeterol and formoterol, with a duration of action of at least 12 hours, represent the first choice of add-on therapy. They have consistently been demonstrated to improve asthma control and reduce the frequency and severity of exacerbations when compared to increasing the dose of inhaled coicosteroids (ICS) alone', 'role': 'assistant'}]