B-type lymphocytes are particularly abundant in:
a. Germinal centers in lymphoid nodules
b. The deep cortex of a lymph node
c. The medulla of the thymus
d. The periarteriolar lymphatic sheath (PALS) of the spleen
e. The red pulp of the spleen
ANS: A
T lymphocytes are enriched in areas like the PALS or the deep cortex of a lymph nodule and ac-count for all the lymphocytes in the thymus.
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