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': 'Most dangerous type of diptheria: \nSelect and explain. \nA. Facial, B. Laryngeal, C. Nasal, D. Cutaneous', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is. 'b' i. e. Laryngeal", 'role': 'assistant'}]