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
Which of following is/ are prodrug/s? 
Select and explain. 
A. Proguanil, B. Azathioprine, C. Prontosil, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Ans. is 'd' i.e., All the above Pro drug* Few drugs are inactive as such and need conversion in the body to one or more active metabolites.* Such a drug is called a prodrug.ProdrugLevodopaOxcarbazepineMercaptopurineBenorilateEnalaprilPrednisoneFluorouracilProguanila - MethyldopaBacampicillinSulindacZidovudinChloralhydrateSulfasalazineAzathioprineTerfenadineDipivefrineCyclophosphamideCortisoneProntosil