Abatacept is -
Ans. is 'b' i.e., Inhibitor of co-stimulation of T cells o Abatacept inhibits the co - stimulation of T cells by blocking CD28 - CD80/86 interactions and also inhibits the function of antigen presenting cells by reverse signalling through CD80 and CD 86.
TNF alpha inhibitor
Inhibitor of co - stimulation of T cells
IL - I receptor antagonist
Monoclonal antibody against IL - 6 receptor