This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NSAIDs, Gout and Rheumatoid Ahritis, Subject name: Pharmacology
[{'content': 'Which of the following drugs is not used in Rheumatoid ahritis? \nSelect and explain. \nA. Febuxostat, B. Leflunomide, C. Etanercept, D. Methotrexate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Febuxostat is a xanthine oxidase inhibitor used in chronic gout, it is not used for rheumatoid ahritis. Disease Modifying Anti-Rheumatoid Agents (DMARDs) 1. Conventional Cute &: Chloroquine P: Penicillamine A: Azathioprine G: Gold Salts L: Leflunomide I: Immunosuppressants Malika: Methotrexate Sherawat: Sulfasalazine 2. Biological a. TNF-alpha blockers A: Adalimumab C: Ceolizumab E: Etanercept INhibitors: INfliximab b. IL-6 antagonists i. Sarilumab ii. Tocilizumab c. IL-1 receptor antagonist i. Anakinra d. Co-stimulation inhibitors i. Abatacept e. B-cell deplete i. Rituximab', 'role': 'assistant'}]