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': 'Bacteria with safety pin appearance: \nSelect and explain. \nA. H. influenzae, B. Vibrio parahaemolyticus, C. Vibrio vulnificus, D. Salmonella paratyphi', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is. 'b' i. e., Vibrio parahaemolyticus", 'role': 'assistant'}]