The majority of t cells of the naive lymphocyte pool wait for the encounter with foreign antigens in the

The answer is Lymph nodes. This is because lymph nodes act as filters, the reticular fibrous of the trabeculae,that sift off foreign material from lymph fluid.  T cells of the immune system will be mainly found in the paracortex of the lymph nodes while B cells occur mainly in the outer cortex. T cells respond to any foreign material through cell-mediated immunity while  B cells initiate a humoral response