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': 'Which drug used in bronchial asthma needs monitoring- \nSelect and explain. \nA. Theophylline, B. Cromoglycate, C. Salmeterol, D. Terbutaline', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Theophylline o Theophylline has low safety margin and therefore requires therepeutic drug monitoring.", 'role': 'assistant'}]