This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
[{'content': 'Which of the following is long-acting sympathomimetic used in bronchial asthma? \nSelect and explain. \nA. Salbutamol, B. Terbutaline, C. Pirbuterol, D. Salmeterol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Sympathomimetics: beta 2 agonists: sho acting(2-6 hrs)- Salbutamol, Terbutaline, pirbuterol long-acting(more than 12 hrs)- Salmeterol, Formoterol, clenbuterol ESSENTIALS OF MEDICAL PHARMACOLOGY 7TH EDITION KD TRIPATHI Page no :222,223', 'role': 'assistant'}]