This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory, Subject name: Medicine
[{'content': 'A 34-year-old man presents to the emergency room with increasing shortness of breath. He has a past medical history of asthma that is previously well controlled but 2 weeks ago he developed a "cold" and has noticed increased coughing and shortness of breath ever since. He reports no fevers, chills, or sputum production. He is now using his salbutamol inhaler for rescue therapy 6 times a day and feels unwell. His physical examination is normal except for wheezing on expiration. A CXR is normal and he is prescribed prednisone 30 mg once a day for one week. Which of the following is the major effect of glucocorticoids in asthma? \nSelect and explain. \nA. anti-inflammatory, B. bronchodilatory, C. sedative, D. mucus dissolving', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Glucocorticoids are not bronchodilators, and their major use is in reducing airway inflammation. It is difficult to provide precise recommendations for their use, and a wide range of systemic and inhaled doses are used.', 'role': 'assistant'}]