<prompt> Cords of Billroth in spleen are found inMantle zoneTrabecular zoneRed pulpWhite pulp  <response>: 75 of spleen is red pulp, predominantly having RBCs. 25 of spleen is white pulp, predominantly having WBCs Red pulp contains sinusoids which are filled with RBCs blood and splenic cords of billroth White pulp contains lymphoid follicles periaerial lymphatic sheath. 