This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2017, Subject name: Pharmacology
Newer monoclonal antibody approved for rheumatoid ahritis is: 
Select and explain. 
A. Durvalumab, B. Pembrolizumab, C. Nivolumab, D. Sarilumab
D: Sarilumab
Answer: D: Sarilumab 
Explanation: Sarilumab: Monoclonal antibody against IL6, used for rheumatoid ahritis. Six - SARILUMAB - monoclonal antibody | Interleukin Durvalumab: Monoclonal antibody for urothelial carcinoma. DURVALUMAB - Urothelial Ca Nivolumab/Sarilumab: Monoclonal antibody for non small cell lung cancer(NSCLC). Durvalumab, Nivolumab, Sarilumab: Target program death ligand of T cell. T cell get activated and kills cancer cells.