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': 'Drug used in multiple sclerosis - \nSelect and explain. \nA. Inferferon alpha, B. Interferon beta, C. Interferon gamma, D. Infliximab', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]