All of the following are the components of the white pulp of spleen EXCEPT:: (A) Periaeriolar lymphoid sheath, (B) Vascular sinus, (C) B cells, (D) Antigen presenting cells
Answer is B. - Spleen is composed of red pulp (~ 90%) having venous sinusoids and splenic cords (of Billroth). - White pulp (~ 10%) of spleen has lymphoid follicles with B lymphocytes at the germinal centers, whereas T cell lie in the periphery. - Antigen presenting cells (APCs) are present in the marginal zone of lymphoid follicles.