This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
[{'content': 'Classification of shigella is on the basis of fermentation of \nSelect and explain. \nA. Lactose, B. Sucrose, C. Mannitol, D. Glucose', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Classification of shigella is done on the basis of fermentation of mannitol Exceptiom-Non mannitol fermenter i.e Shigella dysenteriae which is also catalase negative. The most common cause of bacillary dysentery in India is Shigella flexneri and in world is Shigella sonnei which is late lactose fermenter.', 'role': 'assistant'}]