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
Which of the following is not a bronchodilator ? 
Select and explain. 
A. Beta 2 agonists, B. Methylaxanthines, C. Steroids, D. Anticholinergic
C: Steroids
Answer: C: Steroids 
Explanation: None