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 enzyme is inhibited by Aminophylline - 
Select and explain. 
A. Monoamine oxidase, B. Alcohol dehydrogenase, C. Cytochrome P-450, D. Phosphodiesterase
D: Phosphodiesterase
Answer: D: Phosphodiesterase 
Explanation: Ans. is 'd' i.e., Phosphodiesterase Aminophylline or Theophylline inhibits phosphodiesterase, especially phowhodiesterase - 4