<prompt> Most potent stimulator of naive T cell is?Mature dendritic cellFollicular dendritic cellMacrophagesB cell  <response>: There are 2 types of dendritic cells:Interdigitating dendritic cells and Follicular dendritic cells. Interdigitating dendritic cells - These are the most potent antigen presenting cells for T cells. These are present in the lymphoid tissues non lymphoid organs. Immature dendritic cells present in the skin are called as Langerhans cells. They are non phagocytic express high levels of MHC -II molecules B7-1, B7-2. Follicular dendritic cells -Theses are present in germinal centers of lymphoid follicles. These can bind to antigen bound to antibody present it to B cell. Ref: Robbins 8th Ed Pg 187. 