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: Medicine
[{'content': 'Polyvalent antivenin is not prepared by using the venom of which of the following following snakes? \nSelect and explain. \nA. Naja naja, B. Hypernale hypernale, C. Echis carinate, D. Bungarus caeruleus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Polyvalent antivenin is prepared mainly for four snakes. By hyper immunising with horse with venom. The snakes are Naja naja, Echis carinate, Daboia russel and Bungarus caeruleus.', 'role': 'assistant'}]