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
sho acting acting beta 2 agonist 
Select and explain. 
A. Formoterol, B. Isoprenaline, C. Salbutamol, D. salmeterol
C: Salbutamol
Answer: C: Salbutamol 
Explanation: sho-acting beta2 agonists- salbutamol., terbutaline, pirbuterol long-acting- salmeterol, formoterol, clenbuterol ref kd Tripathi 8th ed