This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Multiple Sclerosis, Subject name: Medicine
[{'content': 'The treatment options for patients with RRMS (relapsing-remitting multiple sclerosis) are all except? \nSelect and explain. \nA. Interferon-b la, B. Interferon alpha, C. Glatiramer acetate, D. Interferon-b lb', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is B. The drugs used for multiple sclerosis Drug Mechanism 1. Interferon-b la Interferon-b lb o Downregulates expression of MHC molecules on antigen presenting cells o | Pro-inflammatory and | regulatory cytokines o | T-cell proliferation o | Entry of inflammatory cells in CN S 2 Glatiramer o | Suppressor T-cells o Displace MBP by binding to MHC molecules o | Pro-inflammatory and | regulatory cytokines 3, Natalizumab (Monoclonal antibody against a4 subunit of a4b1 integrin on lymphocytes) o Prevents lymphocytes from binding to endothelial cells, thus inhibits transfer across BBB and entry in CHS', 'role': 'assistant'}]