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
[{'content': 'Side effect of salmeterol is- \nSelect and explain. \nA. Tremor, B. Seizure, C. Hypeension, D. Hyperkalaemia', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 'tremor o Tremor and palpitations are most common side effects.", 'role': 'assistant'}]