Tocilizumab used against Rheumatoid arthritis is a monoclonal antibody against :: (A) Interleukin-6, (B) Interleukin-6 receptor, (C) Interleukin-5, (D) Interleukin-5 receptor
Answer is A. Monoclonal antibody against IL-6 : Tocilizumab               
Monoclonal antibody against IL-6 receptor : Sarilumab
Both are approved for Rheumatoid arthritis.