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: Microbiology
[{'content': 'M. tuberculosis , virulence factors  are encoded by \nSelect and explain. \nA. Kat-G gene, B. rpoV, C. Erp gene, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: → Kat-G gene ⇒ Encodes for oxidase, catalase enzyme.\n→ rpoV ⇒ Main sigma factor initiating transcription of several genes.\n→ Erp gene ⇒ Encodes for protein required for multiplication.\n→ Strains of Beijing / W genotype family.', 'role': 'assistant'}]