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 dose related side effect of salbutamol is: 
Select and explain. 
A. Nervousness, B. Tremor, C. Palpitation, D. Restlessness
B: Tremor
Answer: B: Tremor 
Explanation: Tremor