This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
[{'content': 'Which of the following drugs can be admistered by subcutaneous nerve \nSelect and explain. \nA. Albuterol, B. Terbutaline, C. Metaproterenol, D. Pirbuterol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Refer Katzung 12/e p344 All four drugs I. e, salbutomol, terbutaline, metaproterenol, pirbuterol are available as metered dose inhaler Salbutomol and terbutaline are also available in tablet forms Only terbutaline is available as subcutaneous injection', 'role': 'assistant'}]