This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Pharmacology, Subject name: Pharmacology
[{'content': 'Drug not causing enzyme inhibition is \nSelect and explain. \nA. Phenobarbitone, B. Omeprazole, C. Disulfiram, D. Diltiazem', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Phenobarbitone Drugs that induce microsomal enzymes* Phenobarbitone* Carbamezepine* Phenytoin* Omeprazole* Rifampin* Clofibrate* Glucocorticoids* Meprobamate* Isoniazid* Ritonavir* Chloral hydrate* Glutethimide* Phenylbutazone* Chronic alcohol intake* Griseofulvin* Cigarette smoking* DDT* Cyclophosphamide Drugs that inhibit drug metabolizing enzymes* Allopurinol* Diltiazem* Omeprazole* Amiodarone* Erythromycin* Propoxyphene* Clarithromycin* Isoniazid* Chloramphenicol* Cimetidine* Phenylbutazone* Quinidine* Ketoconazole* Metronidazole* Itraconazole* Disulfiram* Ciprofloxacin* Verapamil* Sulfonamides* MAO inhibitors", 'role': 'assistant'}]