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': 'About diphtheria true is - \nSelect and explain. \nA. Capsulated bacteria causes infection, B. Ratio of carriers and clinical cases is one, C. Gram positive and motile, D. Lysogenic phase causes disease', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]