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
Over expression of InhA gene can lead to cross resistance of Isoniazid with: 
Select and explain. 
A. Rifampicin, B. Ethambutol, C. Ethionamide, D. PAS
C: Ethionamide
Answer: C: Ethionamide 
Explanation: InhA gene overexpression can lead to cross resistance of Isoniazid with Ethionamide.
KatA gene mutation : Severe form of Isoniazid resistance.