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 enzyme is inhibited by caffeine? \nSelect and explain. \nA. Monoamine oxidase, B. Alcohol dehydrogenase, C. Phosphodiesterase, D. Cytochromo P 450', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Aminophyllines(theophylline, caffeine) inhibits the release of ca from sarcoplasmic reticulum and inhibition of phosphodiesterase3/4 causes increased CAMP and bronchodilation ESSENTIALS OF MEDICAL PHARMACOLOGY SEVENTH EDITION KD TRIPATHI PG NO .225,227', 'role': 'assistant'}]