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: Pharmacology
Salbutamol is preferred over adrenaline in an asthmatic due to 
Select and explain. 
A. β1 selectivity, B. β2 selectivity, C. α1 selectivity, D. None
B: β2 selectivity
Answer: B: β2 selectivity 
Explanation: None