Cross resistance of isoniazid is seen with_____________?
Correct answer: B. Ethionamide
- A. Rifampicin
- B. Ethionamide
- C. Cycloserine
- D. Ethambutol
Explanation
Isoniazid and ethionamide have cross-resistance because both interfere with mycolic-acid synthesis through related activation and target pathways. Rifampicin, cycloserine, and ethambutol do not commonly show this cross-resistance with isoniazid.
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