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': 'Beta phage is seen in: \nSelect and explain. \nA. Bacillus anthracis, B. Corynebacterium diphtheriae, C. Clostridium botulinum, D. Peptostreptococci', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is. 'b' i. e. Corynebacterium diphtheriae", 'role': 'assistant'}]