The circulatory route through a lymphoid tissue for both immature B cells and mature B cells that do not encounter specific antigen is:
a. bloodstream ?HEV of lymphoid cortex ? primary lymphoid follicle ? efferent lymphatic vessel
b. afferent lymphatic vessel ? primary lymphoid follicle ?HEV of lymphoid cortex ?efferent lymphatic vessel
c. afferent lymphatic vessel ?medullary cords ? primary lymphoid follicle ?efferent lymphatic vessel
d. primary lymphoid follicle ?HEV of lymphoid cortex ?afferent lymphatic vessel ?efferent lymphatic vessel
e. bloodstream ?afferent lymphatic vessel ? HEV of lymphoid cortex ?efferent lymphatic vessel.
A
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