<prompt> All are mononuclear-macrophages except ?HistiocytesMicrogliaKupfer cellsB-cells  <response>: Ans. is d i.e., B-cells Blood macrophages - Monocytes Tissue macrophages - Histocytes Lung - Alveolar macrophages Brain - Microglia Liver - Kupffer cells Bone - Osteoclasts Kidney - Mesangial cells 