This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Thioacetazone has cross resistance with ? 
Select and explain. 
A. INH, B. Rifampicin, C. Ethionamide, D. Ethambutol
C: Ethionamide
Answer: C: Ethionamide 
Explanation: Ans. is'c'i.e., Ethionamide(Ref; Essentials in tuberculosis P. 468)Thioacetazone has cross-resistance with ethionamide/prothionamide."A cross resistance between ethionamide and thiacetazone is repoed.Perchlozone also shows cross resistance with thiacetazone.