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: Medicine
[{'content': 'Gene responsible for resistance to rifampicin \nSelect and explain. \nA. Rpo B gene, B. Kat G gene, C. Rpm B gene, D. Emb B gene', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Rpo B gene ATT Drug Gene responsible for drug resistance INH inhA and Kat G gene Ethambutol emb B gene Rifampicin rpoB gene Pyrazinamide pncA gene", 'role': 'assistant'}]