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': 'All of the following are true about theophylline except: \nSelect and explain. \nA. It acts by inhibiting phosphodiesterase enzyme, B. It is the drug of choice for exercise induced asthma, C. Therapeutic drug monitoring is needed for Theophylline, D. It is a CNS stimulant and can lead to seizures', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Steroid is the drug of choice for excercise induced asthma, not theophylline.', 'role': 'assistant'}]