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 of the following class of drugs is a precipitant of acute asthma? \nSelect and explain. \nA. Beta–adrenergic receptor agonists, B. NSAIDs, C. Calcium channel blockers, D. H1 blockers', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]