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
Most common side effect of Beta 2-agonists is 
Select and explain. 
A. Palpitations, B. Hyperglycemia, C. Tremors, D. Hyperkalemia
C: Tremors
Answer: C: Tremors 
Explanation: Tremor: Most common side effect of Beta 2 agonists.