This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'Beta phage is seen in \nSelect and explain. \nA. Bacillus anthracis, B. Corynebacterium diptheriae, C. Clostridium botulinum, D. Peptostreptococcus', 'role': 'user'}, {'content': "Answer: B \nExplanation: The toxigenicity of the diphtheria bacillus depends on the intracellular presence of corynephages (tox+), which acts as genetic controlling toxin production. Non-toxigenic strains are rendered toxigenic by infecting them with the beta or some other phages This is known as lysogenic or phage conversion. REF:Textbook of microbiology; Ananthanarayan and paniker's; 10th Edition; Pg: 240", 'role': 'assistant'}]