This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Asthma, Subject name: Pharmacology
[{'content': 'Which of the following is long acting sympatho mimetics used in Bronchial asthma \nSelect and explain. \nA. Salbutamol, B. Terbutaline, C. Bamboterol, D. Salmetrol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (Salmetrol) (218-KDT 6th)Salmetrol - It is first -long acting selective b2 agonist with slow onset of action* It is also more b2 selective and lipophilic than salbutamolFormoterol - another long acting selective b2 agonists has faster onset of action', 'role': 'assistant'}]