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 unpleasant side effect of salbutamol is: 
Select and explain. 
A. Tremors, B. Hypertension, C. Rhinorrhoea, D. Headache
A: Tremors
Answer: A: Tremors 
Explanation: None