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': 'Safety pin appearance is seen in ? \nSelect and explain. \nA. Vibrio vulnificus, B. Vibrio parahemolyticus, C. Pseudomonas aeuroginosa, D. H. influenzae', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is `b' i.e., Vibrio parahemolyticus Bipolar staining (safety pin appearance) Some bacteria display a safety pin appearance due to the accumulation of dye at the poles of the cells. This characteristic is called bipolar staining. Bacteria showing bipolar staining are? Calymmatobacter granulomatis (Donovani granulomatis) Vibrio parahemolyticus Pseudomonas mallei Yersinia pestis Pseudomonas pseudomallei H. ducreyi", 'role': 'assistant'}]