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': 'False about C. diphtheriae \nSelect and explain. \nA. Toxin production is chromosome mediated, B. Toxic production is phage mediated, C. Toxic to hea and neuron, D. Toxin inhibitis protein synthesis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Toxin production chromosome mediated Already explained Note: Toxicity of corynebacterium is under control of phage gene, but the invasiveness is under control of bacterial gene.', 'role': 'assistant'}]