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': 'All the following are true regarding Vibrio cholerae except - \nSelect and explain. \nA. Transported in acidic medium, B. Gram-negative, C. Aerobic organism, D. Ferments glucose', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]