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
Which of the following is long-acting sympathomimetic used in bronchial asthma? 
Select and explain. 
A. Salbutamol, B. Terbutaline, C. Pirbuterol, D. Salmeterol
D: Salmeterol
Answer: D: Salmeterol 
Explanation: 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