<prompt> Most potent antigen presenting cell is?B cellsDendritic cellsT cellsNK cells  <response>: Ans. is b i.e., Dendritic cells Important antigen presenting cells are macrophages, B-cells, dendritic cells and Langherhans cell, Dendritic cells are the most potent and effective antigen presenting cells. Dendritic cells are the most potent and effective antigen presenting cells. 