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
CYP-450 inducers are: 
Select and explain. 
A. Cimetidine, B. Ketoconazole, C. erythromycin, D. DDT
D: DDT
Answer: D: DDT 
Explanation: eg for enzyme inducers of cyp3a4 - phenobarbitone, rifampin, glucocoicoids, Phenobarbitone also induces CYP2Bl and rifampin also induces CYP2D6.Isoniazid and chronic alcohol consumption induce CYP2El.Other impoant enzyme inducers are- chloral hydrate, phenylbutazone, griseofulvin, DDT. Erythromycin, cimetidine, ketoconazole are enzyme inhibitors ref ;KD Tripathi Pharmacology 7th edition (page no;26)