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
[{'content': 'Which of the following enzyme is inhibited by Aminophylline - \nSelect and explain. \nA. Monoamine oxidase, B. Alcohol dehydrogenase, C. Cytochrome P-450, D. Phosphodiesterase', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Phosphodiesterase Aminophylline or Theophylline inhibits phosphodiesterase, especially phowhodiesterase - 4", 'role': 'assistant'}]