<prompt> Etanercept is a biological disease-modifying agent used in the management of rheumatoid arthritis. Its mechanism of action is:TNF alpha blockadeCOX-2 inhibitionIL-6 inhibitionStabilization of mast cells  <response>: Ans. A TNF alpha blockadeRef: KDT 8the p943TNF alpha blocking drugs are used in rheumatoid arthritis and Crohn disease. These includeAdalimumabCertolizumabEtanerceptInfliximabGolimumab 