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
Theophylline given for bronchial asthma acts by inhibiting phophodiesterose enzyme. It also acts by inhibiting: 
Select and explain. 
A. Lipoxygenase enzyme, B. Adenosine receptors, C. Histamine receptors, D. Monoamine oxidase enzyme
B: Adenosine receptors
Answer: B: Adenosine receptors 
Explanation: Theophylline has antagonistic interaction with adenosine receptors.