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
In theophylline metabolism, drug interactions Occur with all Except: 
Select and explain. 
A. Cimetidine, B. Phenobarbitone, C. Rifamipine, D. Tetracyclines
D: Tetracyclines
Answer: D: Tetracyclines 
Explanation: Phenobarbitone, rifampin enhance theophylline metabolism Cimetidine inhibits theophylline metabolism ESSENTIALS OF MEDICAL PHARMACOLOGY 7TH EDITION KD TRIPATHI Page No:226,227