This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Asthma, Subject name: Pharmacology
Which of the following is not a bronchodilator? 
Select and explain. 
A. b 2 agonist, B. Methylxanthines, C. Steroids, D. Anticholinergic
C: Steroids
Answer: C: Steroids 
Explanation: ANSWER: (C) SteroidsREF: KDT's 6th edition page 217Repeat from June 2009Bronchodilators:Three groups of drugs which acts as bronchodilators are: (Mnemonic: SAM)Sympathomimetics:Non selective b2 agonists like adrenaline, isoprenaline and ephedrineShort acting Selective b2 agonists like salbutamol, Terbutaline. pirbuterol, metaprotrenolLong acting Selective b2 agonists like Salmeterol, Bambuterol, FormoterolAnticholinergics: Ipratropium, TiotropiumMethylxanthines: Caffeine, Theophylline, Aminophylline, Theobromine