This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vibrio, Subject name: Microbiology
[{'content': 'Bacteria surviving alkaline media \nSelect and explain. \nA. E.coli, B. Shigella, C. Vibrio, D. Salmonella', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans: c (Vibrio) Ref: Ananthanarayan, 7th ed, p. 305Culture characteristics of Vibrio: Strongly aerobic Temperature range 16 - 40deg C pH range 6.4 - 9.6 (Growth is better in alkaline medium, optimum pH is 8.2) MacConkey's agar - red colonies due to late fermentation of lactose. Blood agar - initially zone of greening later clears due to haemodigestion Gelatin stab culture: infundibuliform or napiform liquefaction", 'role': 'assistant'}]