This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Corynebacterium, Subject name: Microbiology
[{'content': 'Toxin production by Corynebacterium diphtheria is due to ? \nSelect and explain. \nA. Chromosomal mutation, B. Presence of plasmid, C. Lysogenic conversion, D. Transformation', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Lysogenic conversion o The toxigenicity of the diphtheria bacilli depends on the presence in it of corynephages (tox +). Nontoxigenic strains may be rendered toxigenic by infecting them with beta phage or some other larger phage. This is known as lysogenic conversion or phage conversion.", 'role': 'assistant'}]