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
Adverse effects of salmeterol include : 
Select and explain. 
A. Hyperkalemia, B. Seizures, C. Tremors, D. Interstitial nephritis
C: Tremors
Answer: C: Tremors 
Explanation: None